That isn't the issue, whether you'd trade him. The issue is are they playing better now. Lebron is close, although last night Andre Igoudala really shut him down.
As of this moment AI is playing the best ball of his career, even if the rest of the team isn't. At least that's what his stats say, and he has been league MVP with lesser stats than these.
Individaul stats don't translate into wins. Teamwork does. Is Lebron a better teamate than AI? Well, he doesn't hog the ball as much, and passes it as well so I'd say yes. But Wade isn't nearly as prodcutive, and he has Shaq. Until a few games ago, AI has no-one else and a bad coach. Now he has Webber, but he still has a bad coach. Even a great player can't overcome that, especailly one like AI who would rather shoot than get his teamates off.