I don't think anyone can judge Oberto as a basketball player after one season where he spent 90% of the time on the bench. I saw most of the games and when he got a chance to play, he played IMO, pretty decent. I don't think that any of us should've anticipated a 15 and 10 guy, especially in his first season in a new league.
I'm convinced that if Oberto would be given 20-25 minutes every night, maybe as a starter (I have to see what the Spurs FO is going to do this summer), he would produce more then Rasho and Nazr.