this is my fourth time writing this post because discord hates me 
It would be greatly appreciated if we had better tools and support for custom animations. The existing support is present but notoriously difficult to use or work with. I.E., guns enhanced has almost a hundred lines of XML and some hacky tricks just to give the assault rifle reload animations.
I would love to see some custom fullbody anims outside of specific objects like chairs and beds or movement. It would also be amazing to have a tool to make item animations rather than doing them manually.
the particle editor is already fairly similar to this, but that's for... particles.
I'd be okay with complex animation data being mostly unreadable in XML as long as there was a dedicated tool to using it.