Quis always seemed to get a bad rap because he seemed to play... very casually. Not a highlight-reel player. Always seemed to be a bit awkward. Some guys, they have a smoothness to their game (Joe Johnson's one that comes to mind), others like Quis are a little more herky-jerky. But, very effective in a lot of areas, other than shooting long jumpers.
I do think you have to blame Danny a *little* bit for not bringing in another guy who could play the 3 last summer. Quis's injury was somewhat of a freak thing... but only somewhat. They knew that he had issues with his spine; as soon as he went down, KG was yelling at the opposing players to leave him alone because of it.
Even short of that, he's never been a guy who's been able to play a full season.
Quis was having a helluva good season when he went down, gotta think we'd be in an even stronger position today if he didn't get hurt so bad.