I want Arsenal to finish as high up the table as possible every season, and this season is no exception. I don't think that league position will determine Wenger's future anyway, and I have never seen the logic behind the argument that it would be 'good for us' to finish 5th or lower.
Gazidis is not an idiot, and neither are most of our players. There must certainly be the same doubts among players and staff as are witnessed here, by pundits, and in the media. I think the best bet for change is Wenger losing the dressing room, giving Gazidis a chance to act. Wenger realizing he can't take the club further is unlikely, but not impossible. I think he came close last season, and we aren't doing any better.