I don't see where he agrees on Vi's scene being mishandled. Can only repeat myself; I'd suggest playing through Ch05 again in case you've only been playing the initial release version.
What I think was "mishandled" is the cliffhanger we're left on. But as I said before, I'm assuming that happened because CG bit off more than he could chew in the time he gave himself and so it's missing the conclusion, a true ending to the scene and more fleshed out explanation as to what's going on.
He did work on the final scene, that much we do know.