First I must say this to people saying the lobby is dated and looks nothing like real life.
I will use my own experiences as an example. For instance we have been to the Bahamas and Jamaica. The Caribbean Beach Resort looks nothing like real life. Jamaica for all it has, is in abject poverty. Only the resorts look nice. The Bahamas, better than Jamaica, but still nothing like the pictures.
The resort does not need to look like real life. The Poly lobby is lush and beautiful, downright relaxing. It may not look like anything in polynesia(sp) but who cares.
Second customer flow and check in. Granted, we stay at POP, but I have stayed in Dixie Landings, the Contemporary, and been through other hotel lobbies on and off property. But, no lobby is ever big enough when bus loads of people arrive. POP was the best lobby I have ever been in. Smooth check in, the best by far. The Poly check in area, is perfect the way it is.
As far as the GCH goes. They can mitigate the asbestos without tearing the building down. I have seen it done plenty of times. Now if the building is structurally deficient, then yes bulldoze it for everyone's safety.
I would prefer keeping what is already at WDW because TDO does not have a good track record when they replace something. Usually it is shabby, cheap, and a shell of what it once was. Granted FLE may be the exception but it is certainly not the rule.