Well yeah, but that can't be used as excuse for terrible perfomances against big teams. One thing that bothers me is that we do same mistakes over and over. After Aston Villa match, we changed our approach, we started to sit deeper and and play long balls to Giroud, that was working great, but over the time we get back to our old approach (LFC match for example).
Another old Wengers' habit - not rotating. We rotate mostly when someone gets injured. Ozil, Giroud were great after some rest, but Wenger clearly can't see that.
We don't give chances to youngsters like we used to, Jenkinson is bench warmer, Gnabry is great but gets only a few minutes, Isaac Hayden - highly rated DM (19 today) is yet to feature in PL, started in league Cup against WBA, Chuks Aneke - Yaya Toure-like player, is on fire for Crewe (I know, League One), I bet he won't get a chance either.
Oh yeah, and in my opinion, when we play Flamini we are defensively much more stable than with Arteta, and looks like true leader on the pitch, but this is also ignored by AW.