I just want to suggest a powerful feature.
Group layers like in photoshop or gimp to merge shaders and mask layers.
This allows a lot of new possibilities.
Develop games in your browser. Powerful, performant & highly capable.
+1 At the very least for organization/management. I've got layers for backgrounds, objects, overlays, triggers, zones, HUD, and then global for pause menus and options. Would be nice to be able to toggle visibility or lock all a whole group in one click or target a whole group at runtime.
++1 absolutly, im kind of expecting this will be in eventually, but i guess not possible for c2, seems like "spriter" could use it too