I've thought the exact same thing OP, Buzz would be perfect for Playland - they could even theme the building to be the box that Buzz comes in. However, as others have said, the cost involved makes it prohibitive even if they wanted. Plus if they did do it, it'd be pointless having Midway Mania in the Studios.
As we're talking of moving attractions, am I the only one who thinks that the Flying Carpets would be better in Adventureland Bazaar?
Admittedly there's not a great deal of space there, but removing Le Passage Enchanté d'Aladdin and perhaps part of Le Girafe Curieuse they might have enough space. Perhaps even putting it partially indoors.