Inverse kinematics have been solving most of the animation blending you're describing here for years. Not to dismiss completely the potential of this, but there

Inverse kinematics have been solving most of the animation blending you're describing here for years. Not to dismiss completely the potential of this, but there already pretty good, reliable ways to solve these issues. I believe the person you answered to to be correct in most cases, there is a lot of nuance lost if done by text.