There's a small feature I've always wanted. It's not much, but it'd be nice if there were a separate inventory space just for tools. I find I'm always carrying around most of my tools which leaves a lot of my inventory space kind of... useless. But it's just a small annoyance. Since I've been using the mail slot as an extra inventory space, that's proof there definitely needs to be some kind of adjustment.
Character customization should definitely be expanded! It's talked a lot about in this thread, but I'd be really upset if it weren't like HHD in that aspect. Picking your skin tone and such. It'd also be nice if it were possible to change your face anytime. The "makeup" option in Shampoodle's should be just that, instead of a Mii face. There have been too many times where I'd make a new character just to have the face I wanted.
As much as I adore the music in New Leaf, there aren't a lot of tracks that stand out to me. I really liked the interesting and jazzy, bossa touch of the first game! Everything was so unlike anything I'd ever heard before, it was so unique and really added to the charm of everything. But that just might be the nostalgia talking...
And yeah, definitely more personality to the villagers would be nice. I liked the idea of there being a main personality type and then a secondary personality type. If not, then I guess just more dialogue? I get attached to villagers due to their designs really, nothing to do with personality. It's really boring to pester Snake over and over again for him to keep saying things like woohoo check out my muscles!! Like yeah dude I've checked them out 27 times now. <:'/
I'm confident the map will be bigger since it's a console game. So I'm hoping more PWPs to go along with it. It feels weird being the mayor, but I feel like that adds a lot more achievements to the game overall. Though, it'd be nice if you could choose a "casual" play mode, where the mayor is still Tortimer (or Isabelle!!!), or "advanced" play mode to be the mayor yourself. Just for the people who'd like to fill their encyclopedias and chill and stuff.
...you can tell how excited I am for this game. I went back to ACCF and was blown away by how good it looked. I'm super excited to see just how pretty the Switch version will be!! Town decorating would feel much more satisfying!
Oh, and on that subject, it'd be nice for some in-game path options!