When working on a big project we often need to merge several sprites into one.
For example, different buttons into one Button sprite, or different enemy types into one Enemy sprite with multiple animations.
Currently it's a very difficult and tedious process. Yes, you can save/load animation images, but you still have to manually edit collision polygons, image points, animation settings etc.
Please add an option to import animation from another sprite, or merge animations from two sprites.
Or maybe when exporting animations as zip, include json file with all the data for collision polygons, image points etc. And allow to import this zip file as a complete animation.