I have some doubts that a solid enough team can be put around Wade/Bron/Bosh in year 1, but the following summer, a MLE and LLE addition plus the right minimum signing might be enough to crown them champs for the 4 years after that. Think about it: all they need from a Center is adequate defense and good picks. All they need from a PG is adequate defense and ability to hit open 3's. They'd need a good multi-position player off the bench. That's it, and Miami becomes a powerhouse.
Ditto for Chicago. If they get two stars to match up with Rose, Deng, and their center, they're a powerhouse too. I think Joe Johnson and Boozer are candidates there, or even our own Ray Allen and Boozer.
I'm concerned about the C's in these scenarios, particularly in committing big salary to Pierce and Ray in light of a powerhouse (or possibly two) in the east. If our starters can't play more than 30 minutes per game on a regular basis, and they can't, we're not going to be able to beat a team with multiple stars in their prime by playing our bench against them while our starters ice their aching knees.
It may be in the clubs best interests to go slow in free agency, hope Paul opts out, see how the landscape develops, and then if multiple powerhouses emerge in the east...consider the nuclear option.