I wouldn't hold him exactly to that. Nika subs for the guards and AE is probably first for the bigs but Aubrey will get hers. The problem with Aubrey is that you will need to have shooters in the game when she is in. Aubrey hasn't shown us a jumper yet and that makes her limited and the team limited on offense when she is in.
But there is no denying that, despite this, she makes an impact when she comes in...
I just think that maybe the offense doesn't flow as nicely as GA wants with Aubrey in the game, but she makes up for it with second chance rebounds and amazing defense which often leads to easy fast break points. She also runs better than anybody so she wears down the other team and I've seen GA use her as a post up too. GA is figuring out how to get the most out of Aubrey when she is in the game. Think about it, he calls a post up for the 8th man in the rotation? Yeah, he is looking to get her involved given her 'super human' athleticism.
She is a nice piece to have coming in off the bench. Teams aren't too excited to know that after playing X amount of minutes AND being a little tried, now they have to bust it up and down the court and bust in on getting rebounds because the jack rabbit is in the game!