For about three months in his whole Arsenal career.
I really like this guy but I think he doesn't know where his strengths lie. He needs to understand that his strength is the engine he possesses and try to use that to help the team. No point trying to impress with goals and end up looking like a right plonker.
A similar situation with Coquelin, Wenger said he was trying to do too much and it was only when he started to concentrate on his strength's i.e concentrating on defensive side of his game he saw the improvement in his game as we see it now, started at Charlton and we lucked out on it to some degree
Feel the same with Aaron - as you say, he appears to have lost his way a little bit and could do with stripping his game back to his strength's i.e b2b similar to Flamini last night
On his performance last night - thought it was sub par, two through balls that should have been capitalised on but aside from that not much else, the kind of performance Özil gets slated for with a bit more running and a few more stray passes.