I think he is a good player, he was the starter for the majority of a regular season when the Spurs got the best record. Thatīs gotta count for something.
The backside of the story is that Splitter is a much better player, mainly on defense, and that Blair can only be successfull next to Duncan (which canīt be because Splitter is starting) or next to Bonner (which canīt be because Bonner doesnīt know what "rebound" means) so he ends up playing with Diaw (another player which he can play with but makes a 6-8 "on average" frontcourt).
Summing it up, i think the team has better players than him for what he can do, but is nowhere a bad player or a liability as some think here. At least not to me.
I would like him to have a role in the rotation, i think he can use the minutes Diaw shares with Duncan, as Diaw also shares minutes with Splitter.
Also he seems to be trying to develop a midrange game, if he can, he might be paired up with Splitter.
Outside of his basketball skills, he is a very likeable guy to me.
Clearly his better moments are those nights when Ginobili is a magician in pick and rolls, and he is able to show his touch near the rim.
EDIT: I would like us to resign him if possible at a reasonable ammount or let him go if we can upgrade or get Lorbek who can replace him and booner at the same time but is unlikey he ever comes to the NBA.