I've seen significant recovery.
I love diving in Belize. No question the Atolls are superior but I really do enjoy the reef just off of AC too. And I've been diving plenty of places to compare it too.
Dive slowly, don't go haring around from formation to formation, you'll be amazed at what you'll see.
I'm one of those that loves to dive the Blue Hole too (3 times and counting), but I still understand why others think it is a one time, been there done that kind of dive.