Antoine Walker was one of the most talented forwards in the league, in the top 5 probably. He had all the tools to be a regular all star. For some years he really played at that level, but he needed better coaching and a much better work ethic. He relied on his talent for making everything, but in this league you need to improve and work to make that talent be valuable. He just got uncontrollable under O'Brien's tenure and never really got it back after 2003...
Why should O'Brien be blamed? Didn't he perform well under O'Brien? Maybe an unorthodox system is what fits him best.
Walker was good. It is silly to say someone who make multiple all star games wasn't good.
I don't get all the emotion over Walker. He has had a solid NBA career. He is not a hall of famer, but he has had success, and not he is well into his decline. He should play out his contract, and try to latch on to a contender next year for the league minimum.
I don't see Memphis buying him out any time soon. They would be better served holding on to the expiring contract until the trading deadline passes. I also don't see Walker agreeing to give up a lot of money since there is no guarantee that anyone will be interesting in him for the remainder of the season. He is probably better off having access to the Memphis team facilities and working out in their practices to stay in shape.