Paths: They are confusing at the plaza. There are so many different kinds and I don't know which one to follow. Perhaps you could narrow it down a bit? I really like the "main" path that goes around town! I've had it myself and it's super cute! The area around Kitty's house is great - especially the paths! I like it!
Trees: I love the lemon trees near the recycle shop! It looks really cute

Flowers: I like the area around Aimee's house. I think that, with a lot of work, it could become really pretty! It needs some hybrids and perhaps some more PWP's in the area, but the placement is good

And I love the peach trees nearby! The pink roses are a great idea and I'd love to see it when you've gotten more hybrids
PWP's: I like the zen-ish area! And the fountains, they look great

I really love the streetlights together with the paths in front of your town hall. It simply looks amazing! The tower next to the fountain, under the townhall - if I were you, I would remove it.. It doesn't really fit in
In general: It's obvious that your town is a work in progress. It does, however, seem like you've got a plan for your future town! The paths line up a town, that is easy to get around it, but still leaves a lot of space to future projects and flowers. It will take a lot of work, a lot of hybrids, trees, bushes and PWP's, but it will be amazing when you get it done!
You have an area on the west side with no houses - you could use that for some park-ish area with benches, archs, bushes and trees? That's what I would do. It's also a challenge to make it work since it's not a big area, but a long area (if you know what I mean?) So you would have to be creative
The area with the zen bell could be a whole zen area of your town. Line it up with bushes and bamboo and make a zen garden! You do have some space under the plaza that allows you to do so
I really like nice transitions in towns. Something that makes it clear that you are now entering an area with a different theme or something. Like if you enter the part of the town were all the villagers are or a part with a park. You can use bushes, trees, paths and flowers for that
I would also make the south-eastern corner into a village-thing. Surround the villagers' houses with flowers, make them small gardens and put up PWP's that fits the whole "village" look. It looks awesome!
I hope you can use my review for something! I would happily review your town again, when you have updated it

It looks like a town that is going to be really awesome
- - - Post Merge - - -
Paths: I don't really like the paths at the plaza. It seems so massive that it's just a big, red square. When I finally found the path on the left side, it was 5 squares wide. It's a lot. But yeah, that might just be my opinion

I would also really like the path to go all the way around town, also to the villagers houses. So connect everything and I would like the path to be like 2 max 3 squares wide
Flowers: Your flowers seems to be all over the place. Except the roses and the northern part of your town. Are you working on that? I do really like the red and pink roses

Perhaps you could add some white! It would look awesome!
Trees: There are a lot of trees and they don't seem to be in any order. Perhaps you should make some patterns with the trees? Use them to line up paths or create a forest?
PWP's: Your PWP's seems to be a bit random placed. You have a flower clock at the western part of the southern island that has great opportunities for a park-themed area or just a pretty area! The cube and streetlight in front of the caf? seems a bit weird? If I were you, I would get an idea of what kind of town you want. What kind of PWP's. Perhaps split the town up in areas with different themes. It would make look better, instead of all the different PWP's mixed together
In general: Your town seems confusing and looks like a work in progress. It needs some kind of theme, some kind of thing that ensures that all the parts of your town makes sense. I would start out with the paths, make a path around your whole town and don't leave out any area. After that, you can place flowers, bushes and trees. I would start with the trees, then bushes and flowers in the end. You can also think about PWP's and the placement of the PWP's you'd like