Mhh...Personally, I think villagers shouldn't place their houses on any bush, tree, flower, item neither paths, obviously. Of course, randomization can be a good thing, too. Actually, I think it's amusing to try to find a solution to all the problems randomization causes, but I don't like loosing something on which I worked a lot. Also, I'd like a new way of placing PWPs, bushes, trees, flowers etcetera similar to Happy Home Designer's. Maybe we could pay Tom Nook/Isabelle to have the right to decide in which areas villagers can place their houses, too.