I agree with certain terrains getting tired. I mean, it's hard not to have them in the game, since they're pretty natural in the actual world, and the regions are based off of such. It's pretty much guaranteed that we're bound to see some sort of forest in this region. Maybe if they added some different type of twist to it. Maybe like falling trees (kind of similar to what Unova had, but more puzzle-y)? I don't know, just something to keep it fresh!