While overall I find the mapping tools more than sufficient, I've found myself wishing for something extra. That extra is a layer above the token layer, visible to all, which cannot be interacted with, and allows interaction with the token layer through it. The purpose of this layer would be to add things like: Shadows, Weather & Clouds, or perhaps elevated set pieces, via the use of images with transparency. I believe it would add a lot of atmosphere to be able to have the rain pounding down above players heads, or to have clouds both above and beneath a battle aboard an airship. It seems like it would not be terribly difficult to add such a layer, since the GM layer effectively works the same way, but is only visible to GMs.