I'm not so sure about the lack of motivation.
He's always come across as a very hard worker.
Surely the thought of playing the top flight players of today and continually getting thrashed is almost as unpleasant as losing in the early rounds to weaker players. The sting of losing coupled with the drop in rankings must be extremely painful to a former champ.
Would love to see him stick around, but I'm not sure how long he can take the pain. At least Euroka will be happy if Andy (not Murray) retires! 
don't think euroka is happy with a player going away.
I have never been a fan of Andy for this reason, Dallas talks always about 2003 the year of the young guns, Federer, Roddick, Ferrero, Hewitt. Ferrero and Hewitt had the bad luck of so many injuries, Roddick has been injury-free.
the thing about working hard of Roddick, i disagree,
in fact that's the reason of his lack of success, he didn't develop for years what he brought to win the uso in 2003, in fact he didn't try to improve his game thinking he had enough to win the big titles, when he realised he had to finally adjust and improve his game it was way too late. he should have taken clay more seriously and try to improve his overall game but I am talking about 2007-2009, he realised he had to improve when it was sooooo late. sad.
on the other hand, i find that he is one of the few players with some interesting comments and views and think he is charismatic. I am not sure about his future, Ferrero and Hewitt have no problems, no egos to play and compete as former world number 1 and major champs and just look like great veterans, simply as this, hope with Andy is the same.
