Hm, maybe its possible to generate the ERC code directly out of the pose. E.g. you pose it, fix-morph it, and use the pose to derive the ERC parameters to have the morph applied 100% when the figure is bend into the current pose. This should be possible at least locally when there is only one bending dial active.

1. should work already because you can just overwrite the morph targets in an active figure. so you could rework the .OBJ, and reload it.
2. pz2/cr2 rules is indeed a  mystery :) an export into a pose file would be excellent. I think for morph deltas it is not so difficult, as long as in the figure the morph channel already exists.  at least i think the figure has to be prepared somehow, but I am not into pz2 details :(

regarding erc binding in a pose file, I do not know if it works. but isnt there the "simple m4/v4 fixes" product of corvas? i do not have a copy, but the product description sounded as if he managed to do it.