Animation issues, how to fix or report problem?

Hey, I was working on my game and animations worked fine, but as soon as I got the beta to try out the new stuff the animations are way harder to work with. My biggest gripe is that I can't have a negative value for rotation in an animation, and my models depend on this heavily. Also the torso of the model retained its animations but I can't make any new animations for it, but the legs are completely broken, only the left leg making any motion. Is there any solution to this, or could someone at least someone tell where to report this issue? Thanks