Eh, I have no problems with it. To be sure, the duel from Empire is still my favorite, but I always understood why the Return fight wasn't as good, simply because Luke was more mature, trying to save his father, blah, blah, blah. I always understood it to be more of a psychological battle, and the emotions still ran high in it. Of course, I suppose that maturity and non-aggression theory kinda goes out the window with the prequels showing every Jedi in the known universe indiscriminately kicking ass. But the few seconds where things are intense blow every lightsaber-based activity up to that point away.