Since Cher is one of the producers of the show, we can be pretty sure she is happy with what is in it and what is not. I would love to see you practice your "charitable attiude" on Cher in a meeting where you tell her she has "erased" her son. I imagine she'd have a few choice words for you. That's theatre that would be better than what's on stage at the Neil Simon right now.
And by the way, you haven't even seen the show? Makes you an expert, I guess. But here's a hint: it's called The Cher Show, not the Chaz Show. Carole King's children aren't even mentioned, as I recall, in Beautiful. Give it a rest.