I actually created a POC some time ago:
It let’s you* play different animations on instances, as well as allows you do move, scale and rotate bones dynamically. My arachnid is a bad test case as it has 110 bones(loads of helpers from Max’ IK)
It’s only a very basic POC and could probably do with quite a bit of rewriting. For instance, meshes not in the camera’s frustum are still calculated. I just did a quick test using the VAT shader