We aren't playing 4E right now, in part because we have one player who just does not play when we are playing 4E; he tried to get into it, but the Wizard's situation, combined with the "simulation-breaking" game mechanics, just didn't do it for him. Things like healing surges, some of the push/pull powers that are vaguely worded as to why they work, etc. just took some of the fuzzt bits already present in 4E and expanded upon them to simply cross the whole system. So, long story short, we value our gaming time with him more than we value time playing 4E. We'll get back to 4E, likely, but for now we're having too much fun running Star Wars, 3.5e, and other systems that he WILL game with us, and quite frankly I have lots of people willing to play 4E, but not many willing to DM the game yet; I think the fear quotient is still pretty high on that part, despite me telling them I've had more fun DM'ing 4E than I've had DMing in YEARS.
Ultimately, any game system that causes a rift with friends, or loss of time with friends, ain't worth it, quite frankly, no matter how well designed it is.