The new Tilemaps feature is fantastic. Now I don't need to sort through a hundred different tiled background objects to find the one I'm looking for; you should have seen my folder tree for Tiles, it was a mess. x_x
There are some UI improvements I'd like to see in C2 which would speed up workflow without reinventing the wheel. Using keyboard keys to select an adjacent tile in the tilemap (e.g. using WASD while drawing tool is selected) would be much faster than moving the mouse across the screen every time I need to switch the tile I'm drawing with.
Autotiles (see link above) are a very powerful feature that would save me tens of hours of busywork. Something similar to this feature exists in Tiled, but it's a time-consuming and unintuitive hack, so I hope you would still consider implementing this anyway.
Thanks for all your work on C2.