Attention on the court... is ALWAYS a good thing. If the other team's attention is on one player, all the other players have an automatic advantage. Especially when you have the court vision that LeBron has.
Bulls won two series ending Game 6s this way. Paxson and Kerr have never ever been mentioned among the greats, or even among standout Bulls of that era. Yet they hit the big shots that Jordan fed them for.
If the Heat go ahead and snag Mike Miller, dude can plant himself behind the 3-pt line and shoot wide (by 10 feet) open shots.
Attention off the court can be good for your teammates too... takes the pressure off of them. No one blamed Jamison's bricks, O'Neal not being able to be Shaq, or Williams's inconsistent scoring. Attention to LeBron, blame to LeBron.
Heat will win the ring next year, with more titles to come.