Meh. I think he'll stay. Wade declined quickly and Bosh is a good player, but not more. He'll get criticized no matter what he does, so it doesn't really matter. No one would win a championship with the squad that was around LeBron this past year. Even if you consider Bosh and Wade really good players still (they're not), there were zero decent role players around them. Their whole bench was terrible and Allen is nothing except a guy that can hit an occasional 3 any more. Chalmers is as useless as players in the NBA get.
The role players look good when they win but they look bad when they lose. The Heat were a LEbron cramp away from being up 2-0 in the finals. Nobody would have said anything about a weak supporting cast then. Lebron basically was played to a draw by Leonard. That is the biggest reason they lost along with Wade being awful.