VanitasFan26
I'm just a ghost.
It's fairly easy to get a lot of stars by just randomly putting down furniture and fencing in no particular order. What I actually don't care for is that if you try to go a nature or minimalist look and not turn your town into a cluttered metropolitan, it's more difficult because Isabelle just wants you to 'deck your island out head to toe.'
I will try to explain what Isabelle says when she gives these statements:
"Lacking appealing scenery"
it means that you don't have enough furniture decorated your island and you don't have enough fencing. Do this make sure you put a lot of furniture all over the island and have more fencing usually I just use fences to make big gardens. Also use Streetlamps, Floor Lights, and Garden Lanterns to place all over your island. Those are the ones I would recommend.
"Landscape has potential"
it means that you need to have variety of trees planted (Saplings, Cedar Saplings, Fruit Trees) and a lot and I mean A LOT of flowers planted on the island. This one is hardest one because you really need to plant so many flowers just so that Isabelle is more satisficed and the rating should go up. It is confusing sometimes and just thought I would clear this up for when Isabelle is a bit harsh on your rating so I hope this helps out.