>>333218903
You can certainly do it better than vrchat does (IKTweaks mod is already an improvement). You inevitably have to trade off some level of fidelity wrt to your avatar's pose matching your irl pose and the ability to have e.g. your outstretched hands and feet match your avatar's hands and feet in first-person. If you prioritize the former, you can have a perfect puppet that copies your irl pose and looks good, but when your stick your viewpoint in the avatar's head your hands and feet rest of your body don't match up. If you prioritize the latter, then you have to match your irl proportions exactly and you get weird stubby leg avatars.

Theoretically, you could non-linearly warp your first-person space to match the mapping between your avatar proportion and real life so you could have avatar proportions and corresponding tracking, but I bet that'd be really really weird.