I don't think Paul instead of Lebron would be much of an improvement. I do think Paul instead of Wade would make a big difference. I think Lebron is a much more capable and dangerous off the ball player than Wade is. I've seen Lebron play off the ball with Mo Williams for stretches(he couldn't do it in the play-offs because Mo Williams turns into a choker and plays like trash), and I think he'd do well with Paul. Simply put I think Wade needs the ball more than Lebron does.