The Heat are actually getting worse, but they remain a good team, capable of stopping or scoring on anyone most of the time. They really are very thin, so the few injuries they've had are hurting them bad right now. The chemistry isn't there, but it doesn't really need to be for this team to be uber-successful (i.e. just the sum of the parts is still pretty fucking insane with this group). Basically, they alternate between being 2010 Cavs and 2010 Heat, depending on who is bringing up the ball. Bosh is invisible, and looks horribly scared at all times. He may well be just a giant gaping pussy - hard to tell 'cause he's never been to the playoffs, but it's looking that way right now. It's not like they have a lot to lose now in the regular season - they probably aren't going to get HCA throughout the playoffs no matter what. And the worst they'll finish now is probably 3rd in the East. They can afford to fuck around and work out the kinks a bit more before the games get serious.
OTOH, the Celtics and the Lakers are very well-balanced teams that look stronger all round than the Heat. If I had to guess, they'd be my picks for the Finals right now, with the Lakers winning again. Magic are very good but completely one-dimensional. Either the Celtics or Lakers could take away their whole offense pretty easily. My MVP so far is Chris Paul but they're not getting out of the West.