Cazorla I will 100% agree with you. He's been injured quite a bit and up in age, asking him to play 3 times in a week was ludicrous and it bit Arsene pretty bad.
Now on the point of not needing Alexis or Ozil to easily manage a result against lesser opposition...He did that in the league cup against Southampton, and we saw the dividends it paid against West Ham, and again Ozil had a full break on the last international break unlike Alexis.
Everton, despite poor form, aren't a team to easily manage a result, they were and still are unbeaten at home, the team went up 1-0, that and a chance to go top should be more than enough to see that game out.
After the City match it's a decent 7 day break until Boxing Day. Rest is happening, and if anyone deserves and needs a rest, it's Koscielny.