I would love a native way to use tilesets in C2. I don't need to make them in C2 as I already have a program (PyxelEdit, exports tilemaps in both XML and plantext/CSV, exports tilesets in png)
All of those are features I would love in a tileset object, and I bet would improve performance over 100s of sprites with their own instances and collision vertices to check.
That last part though, sprites crash C2 if they have too many frames? D: That's not good for my project that uses tiles.