Moores should have been sacked several series ago, it was obvious from very early on that he was going to be pretty hopeless as head coach.
If Pietersen does walk away from the scene completely, then England are going to sink beyond the top 5 or 6 best teams because without him their batting lineup is spineless. I mean, you would be as well surrendering at the start than relying on the likes of Cook, Bell and Prior to perform when the going get tough.