Paper Skeleton Editor Advice and Suggestions

So, I’m about to start work on a Skeleton/Animator for Paper2D inside of UE4.

Questions:

  1. What features would you like to see implemented into the Paper Skeleton Editor?
  2. What would you like to see the backend structure be like?
  3. Are there any concerns you would have about a system like this?

Any other advice or suggestions is appreciated, thank you!