I typically prefer endings in which the de-boobed individual(s) don't get their chest cushions back. It's the equivalent of someone coming back to life in a snuff fetish story; total boner killer.
That and the fact that the villain could have just taken the breasts for herself... I do believe her growing them back could be handled better, perhaps draining both powers and bust from the She-Hulk look-alike, then instead of reverting midsex she has a run-in with several other super heroines, draining them to become FAR more freakish!