I don't think they blew it up, none of those guys will be stars. Gallinari's still an overrated volume chucker. Wilson's an okay third option, not much more. In any case, Melo's a bad fit, and it's pretty embarrassing that they could have had Deron Williams for, at most, the same package, possibly less.
I actually think one of Melo and Stoudemire will be gone by this time next year, maybe even this coming summer. It's a square-and-circle fit with them, it's obvious Stoudemire's unhappy, and it could get ugly.