Miami without Lebron would still win 55 games and make the ECF finals, granted wade played 85% of the games. they still have the best talent in the east bar none when healthy. They would have to play more conventional lineups
Birdman/Oden
Bosh/Haslem
Battier/Jones/Lewis
Wade/Allen
Chalmers/Cole
still a very good team
Are you stupid? Wade can't play back to backs and needs constant restong whole he's the clear cut 2nd option and with Lebron carrying the workload. Imagine if you had Wade playing the majority of games, made him the primary playmaker and scorer so defenses could key in him like they get to do Bron over the course of an entire season?
Who are you gonna have guarding the likes of Paul George, Durant, Parker, Milsap, etc when Battier is resting? Wade? Beasley?
Birdman is a high energy player that tends to give you a solid energy spurt but he's not a solid post defender despite being a great shot blocker.
What about their offensive sets? They're built around Lebron's passing and the idea that teams have to clog it double to contain Lebron's inside presence. Who requires constant double teams now? You want Wade to be your primary playmaker?
Single games are not the best course of how a team operates over an entire season. Wade would break down and be injured come playoff time. Butler was out for the Bulls. Imagine you got Butler guarding a Wade over an entire game like he did Lebron.
That teams flaws become VERY apparent come playoff time. Hell, a team like the Wizards would give a Lebron-less Heat hell over a playoff series.