Yes Manu came of the bench in 2003 which was 9 years ago. 2007 was 5 years ago, he's not the same player now that he was then.
Dirk and KG are out of the playoffs, and Kobe is broken down - Tim doesn't have to put in the same amount of energy that a guard / small forward does.
Sorry, but to me Manu at this point in his career has become more of a liability that an asset.
Since you can't fix stupid, at least you should be able to prosecute it!