Here’s something old from the roblox blog: http://blog.roblox.com/2013/10/new-movements-set-stage-for-keyframe-animation-system/
In the second-to-last paragraph, a ‘grand vision’ is mentioned where users can edit and download animation sets. Is this going to happen eventually?
The idea makes sense to me. It would be nice to, say, import all of the animations from Speed Run 4 with one click. And you could export animation sets for other users to use.