He had a clear philosophy when he arrived, we were going to play a high line and press to get the ball back as quickly as possible. And as I recall it resulted in a 20 some game undefeated run, not sure I remember very many people calling for his head then and all of the Unai haters were strangely quiet. You couldn't find AFC East for the life of you back then.
I'm guessing that the back four injuries put that to rest and he tried 3 at the back etc etc and it all went a bit wrong after that. He still doesn't have his first choice back four (I would argue he has only one of them) and he's trying to play younger players as the dross he was left by Wenger simply isn't good enough and as a result there are going to be issues with continuity, team selection etc as he tries to get it right.
But the main point is that I don't want to be Chelsea, we should be bigger than a club that chops and changes every time it starts to go wrong. All Arsenal managers deserve 2-3 years at least to prove themselves and then if it doesn't work we move on. I strongly expect that people like AFC East were calling for Wenger's head in 2001 and lambasted him for fielding a team without any English players because it went against the traditions blah, blah, blah.
Ferguson was almost sacked early on at Man Utd, Wenger received no shortage of criticism in 2000/2001 - and as I said, let's remember we improved marginally last year and are currently fourth, ahead of Tottenham and Chelsea.