I noticed something very interesting during my week at WDW:
It seems that even if you throw out SuperStar Lemon and Mulholland Mistake, count all of the carnival games in PP as a single attraction, and count Flik's Fun Fair as a single attraction,
DCA, for all its relative immaturity, still has a higher attraction-count than MGM or AK.
That doesn't mean we don't need more and better content. But it does mean that perhaps a bit more patience is called for.
Also: I happened to notice that the attraction building in MGM for GMR was much smaller than I remember it. Maybe we do have enough room, if we gut the SSL and H&D buildings, to squeeze in the entire attraction.