What will support an injunction -- it's particularly hard to make that argument when the Spurs were 2-1 with Joey calling games this season. I don't have time to research it now, but I'm pretty sure that they were also 2-1 in Crawford-called games last season. Pretty tough to say the guy is screwing you when you win most of the time.
The Spurs, I'm sure, expressed concerns to the league. But the league can't make exceptions just for the Spurs. Whether Spurs fans want to believe it or not, Joey Crawford is consistently among the best officials in the game. His calls tend to be very accurate and, in my observations, he seems to be very consistent. He has a personal issue with a player; while that's problematic, he has been punished for it (losing an entire playoffs worth of extra checks is a pretty substantial penalty) and the league has re-evaluated his fitness to call games. Clearly, the league has decided that Joey is fit for the job. We don't like it, perhaps, and we're now inclined to read bias into all that Joey does, but at the end of the day, he keeps his job because notwithstanding our views, he's actually really good at it.