First of all: one week after I leave? Thanks Shanghai!
Second: Honestly, I don't feel strongly either way about this. While I'm certain I'll be one of those taking advantage of the offerings, I don't mind the status quo, either. That point being moot, I may end up going to Tony's for the first time LOL.
Third: Cinderella's? I thought that was an odd choice - never been, but isn't that the one where the whole point is for the little kids to meet Cindy?
While I think adults can handle the occasional bratty kid and/or drunk adult, I'd be more protective of little kids from a parent who might overdo it at the castle. I'm not saying it will happen nightly, but really, once is too much.
Fourth: some other business-y points beyond the obvious moolah for the mouse: This could keep some people in MK longer. That can have some pro and con effects on MK as well as the other places for which people would leave MK. This could mean the difference between locals with AP's staying on property for dinner vs. stopping at Bonefish or Publix on their way home. (If you're going to leave MK at 6PM, and you live 20 minutes away, why bother coming back or park-hopping?)
Examples: reduced monorail traffic and other transportation(?)
Fewer families with kids leaving MK to eat at the resort or Epcot because Dad wants a beer? Therefore, fewer kids at those more "adult" places, especially on the monorail line?
Dad more freely buying stuff for the kids after he had a couple?
Easier to get a table at Epcot? (OK, MK restaurants may have to step up their game for this to happen.)