I’m not a developer, so this might be a silly suggestion, but couldn’t you just do leg animations instead of torso animations? I have to imagine those are much more similar, then you just have the torso animations face forward and the leg animations for sidestepping/backstepping etc. That would also help with the tech debt, since most skills probably wouldn’t need additional leg animations.
I'm not an animator so I'm kinda just parroting what they told me on it but yes, some parts can be mostly reused. It is however not so simple as just doing half of it because you still have to split, setup and adjust the other half of each. This is one of those things that most of us just don't know that we don't know.