Would it be a lot of work to just take the flooring as we know it (planning- and building-possibilities, same sizes although an added 1x1 size would be wonderful for 'lost spots') and give them only a new texture/skin?

What comes to mind are grass, water, mixed flowers... have that little pond on your plot, grass around it, some flowers here or there.

This seems to me (could be wrong of course) a way to get these in game with not much work to it?