I think that would be the Geomancer’s job eventually. For now, though: I find that the second two wood colors match the dirt colors fairly well, and @Relyss’s Slabs with Terrain Colors comes with grass.
I’m not sure exactly how I feel about the possibility of proper dirt items rather than dirt just being stone. I’ve gotten so used to the stone dirt… but proper dirt might be nice… though it would mean you’d have to mine a lot deeper / further in / in a mountain to get enough regular stone. I definitely feel grass shouldn’t be dropped as an item. Pickaxes aren’t very good IMO for collecting grass and stockpiles / crates aren’t very good IMO for keeping grass alive. Of course, the developers’ opinions may differ.
I would like proper deconstruction of buildings. There’s probably going to be destruction at some point, so deconstruction would just mean a little extra work beyond that and construction that we already have.