I've been going since '08 and really miss the Osborne Lights and the Stunt Show and pretty much everything else you mentioned, I do love all the new stuff but I feel there was room at Disney World to expand and keep all of these great attractions and shows and stuff.
Just rebooked my 5 night stay so I'm getting the 5th night free now, thought about adding another night since it would be free but 5 nights are plenty since it's just my daughter and I.
I just booked for late August, I'm going no matter what. If you have concerns, you can always book now and you would have until 30 days prior to your trip to cancel so start planning. ;)