Paths - The paths really do go together well with the bridges! But perhaps you could make paths from every building to the system? So there's a path to every villagers house, to all the buildings and so on, so you just have to follow that all around

That would make it a lot easier to find your way and it would make it all seem connected

Perhaps you could use the same kind of path all way around?
Flowers - You could, with all your amazing hybrids, make small gardens or areas with a certain color or kind of flower? Maybe put flowers around villagers houses like you did on Roscoe's house

Or you could put them along the paths

Trees - I really like the trees around the path, next to Diana's house (on the right side)
PWP's - the bench at Fuchsia's house seems a bit random, but I really like the hot spring and the statue fountain! Perhaps you could surround it by some flowers or some paths?
Your town seems a bit random at this point (I don't mean this in a negative way), there's lot to work with! Are you going for a fairytale themed town or perhaps a more naturalistic town? Try to make it all seems connected and especially the "random"/"lonely" pwp's could use some surroundings that made them seem like a part of something
Bushes would really help, perhaps making a park with bushes, PWP's, bamboo and some paths?
If you want me to be more specific, just let me know ^__^