Considering the egg Boozer laid in the playoffs, why not make a move? The roster as it stands isn't going to get it done. Haslem can give them some of the inside toughness they need, and Beasley and Deron would make a great young core.
Boozer lives in Coral Gables, about ten minutes for American Airlines Arena, and has a toddler son who is stricken with Sickle Cell Anemia. I'm guessing that living in Miami year round would be attractive to him and his family. If he's opting out anyways, why wouldn't Utah make a move now?