Hi! ^^ Here's the annoying "suggestions guy" again! XD
This time I would like to suggest... Possibility of using several bones to manipulate a single image, using weights.
For this, you probably would need creating and adding a mesh to an image so we can add the bones and weights, and deform it with the bones.
The weights could be added manually or automatically (it would be a good idea to let the users edit them later, though). They could be represented by colors, like in the following (Unity) example.
I'll add a pair of examples that you can test freely (there are also some paid options, but these two are good enough).
Anima2D on Unity (free for personal use):
https://forum.unity.com/threads/wip-anima2d-2d-skeletal-animation-system.346691/
https://learn.unity.com/tutorial/rigging-a-sprite-with-the-2d-animation-package
DragonBones (free, open source):
https://docs.egret.com/dragonbones/en/docs/dbPro/advancedFeatures/skinWeights
http://dragonbones.effecthub.com/asdoc/V2/dragonBones/class-list.html
Not sure if PixelOver could somehow make a symbiosis with DragonBones or something like that, but I'll just copy these links here, just in case they :)
https://github.com/DragonBones
https://github.com/DragonBones/gddragonbones (Godot plugin)
I hope you like the idea. The work behind looks a bit daunting, but it would be an amazing feature! :)