I think your other points are valid but what you said here is true for the other games as well. I still play New Leaf daily and I have Ribbot and Snake who might as well be the same villager since they pretty much say the same stuff sometimes right after each other. However, in NH while the dialogue can also be repetitive, villagers of the same personality can actually have more distinction because of a fleshed out hobby and subtype system. I have Whitney and Judy and they feel different from each other because Judy would most often be singing somewhere in my island while Whitney usually walks around wearing different accessories each time like some fashion icon.
While mostly true, I want to mention that in Wild World at least, villagers of the same personality did not always have identical dialogue due to its hobby system, which worked differently from NH, since villagers not only had a hobby like fishing or collecting fossils, but they would talk about these hobbies and the requests they gave you would often be based on these hobbies. I could have multiple snooties in my town, but one could be interested in collecting furniture while the other liked catching bugs, and so they'd be distinguishable that way. NH villagers don't talk about their hobbies at all, so there's nothing that distinguishes one of my normals from another when I talk to them (except for subtype stuff I guess, but I really don't notice much of a difference between subtypes).
Here's my view on NH:
The customization in this game is amazing, and although I'm not very creative, I really enjoy trying to arrange various areas on my island; I never got into decorating my town in NL because PWPs were costly and time-consuming, and I was never really sure of where I wanted anything. NH hands you ultimate power and freedom and you can design to your heart's content, and it's great at doing that!
That being said, I fell in love with the series in Wild World because of the characters, immersion, and being able to make friends out of my villagers; I loved talking to my villagers all the time and got excited whenever I got a special visitor, like Gracie or Saharah. The special character episodes were great, and it even had that cool red turnip trade sequence with the special characters! Back then, the cast of characters were what made the game. Now, the special characters have no story and only exist to be helpful, and the villagers are decorations (although I won't ignore the fact that they have improved how villagers interact with their surroundings and how they do more idle activities).
That's where I have issues with NH. I think it's improved over NL; I have no real attachment to NL (apart from the furniture selection), as WW beats it in terms of characters and charm and NH beats it in customization and freedom. I won't talk more about NH's dialogue here as I know that topic's brought up all the time. But the special characters have always been a pretty important part of the series, and they help to create that quirky, charming atmosphere. Did I use Katrina in NL? Practically never. I didn't use her much in WW or CF, either. She's pretty pointless, but she's been in every single game since the beginning, and having a game without Katrina just seems
wrong, and for that reason I'd be thrilled to see her come back. NH could easily expand on her role, too; they could have her operate a small shop in her tent, offering various mystical items, for example. Or since Nintendo likes pushing online subscriptions so much, what about the charm system from CF? (I wouldn't want it, but maybe if there was a way to do it individually :P)
Even Harriet is someone I'd want back. Yes, we can change our appearance with a mirror and it's a lot more convenient, but for me AC has never been about convenience. Maybe I'm one of the few that thinks this way, but I'd rather be forced to go to Harriet to change my appearance than be able to change it on a whim and have Harriet nowhere in the game. But even the way it is now, Nintendo could have Harriet sell special hair colours/styles, differently coloured contacts, or even highlights or something!
Another thing I want to bring up is the missing furniture series. The previous entries all built up a huge selection of furniture series that expanded on the previous game, and NH replaced it all with new stuff. That's not to say I don't like any of the new stuff, because there are a lot of NH items I love, but for long time players of the series, I think many of us would have gotten attached to certain items that we're disappointed to see cut from the game. For example, I miss the blue series, which has been in every AC game until now - yes, it's sort of been replaced by the wooden series customized to be blue in NH, but it's not the same; what about the diamond motif it had in its items? Yes, it's a minor thing, and the wooden series is more flexible, but for me, those little quirks were what made it unique and special. I don't think it's much to expect something that has been in every prior game to return in NH; yes, it's not the same game, but when you take out so many of the things that were a part of the series for so long, it starts to feel like a different series.
I know NH is meant to be a completely new game and not just New Leaf 2.0. New Leaf was a completely new game at the time too and was definitely not City Folk 2.0 - it was totally different from CF as it handed you so much control and customization and new locations. It added these things without cutting so much of the stuff that fans who have played previous games have gotten attached to. Not everything needs to be cut or replaced to have a totally new game.
Also, despite NH having a lot of furniture items, how much is actually accessible? Considering how we're locked to one variation per item per island, we have very little chance to get items we can't get on our own without paying extra for a subscription (I realize $20/year is not a lot, but it's the principle of having to pay for furniture when we could get it all on our own without trading in prior games). I don't know if CF or NL used a furniture group system, although I think WW did, but in a way that you got one group more often, but you always had a chance of getting items from the other two groups. I'd be fine if NH at least gave me a chance to have the sky blue cute series show up at Nook's Cranny instead of knowing I'll never see anything outside the white one.
The probability of AC going back to being more of a life simulation again is practically zero considering its popularity as an island designer, but why not have a balance of both? I think it's great that people love and enjoy NH, and I enjoy it too despite the issues I have with it; I just find it sad that they've dropped so much of the content that's been in the series for so long. By getting feedback from those who preferred the older games and those who prefer the newer ones, hopefully one day Nintendo will release a game that appeals to both. Obviously no game will make everyone happy, but I think AC has the potential to release a game that's strong in both life simulation and designing aspects - I just don't think NH is that game. Not now, at least.
While I found the first year of updates to be mostly disappointing, I'm hoping that it's due to what others are saying in that the first year was focusing on holidays, and now we'll start to see bigger stuff. I think Bunny Day is actually encouraging for this; it seems like instead of creating a new Bunny Day event this year, they're copying over the old one and adding a few new pieces of furniture in Nook's Cranny. I can't imagine them doing holiday updates which consist of only putting in some extra furniture in the shop, so I'm thinking they'll have additional stuff to release alongside them. My hope is that in some future update, we can access a city-like area where we'll be able to find Katrina, Harriet, Gracie, and others, and I think that's possible; after all, we still don't know what purpose the dock will have - maybe none, but I don't think it's a stretch to think that the 2.0 update (whenever it happens) could bring Kapp'n docking his boat there to take us to some of the long-lost special characters. For now, I'm going to remain optimistic about the return of some of the old characters, at least, but I won't count on anything beyond that.