I'd be disappointed to see Nasri going, I think he's very talented and last season showed some of that, a bit more experience and he could become very good.
If he decided the leave I wouldn't hold it against him either, as a club nothing changes from season to season, it must be frustrating for the better players with ambitions of success.
Wenger doesn't help himself or indeed his chances of keeping players with his stubborness and reluctance to change things when required.