I think you mean yelliwcateyes, I am in no way related with any balancing.
With that said, I very much disagree with the notion of removing their bonus AC. I think removing bonus feats is the way to go.
Melee PMs without that AC are going to plain out lose against any meleer. Their AC does not offset the HP and damage output difference. The cookie cutter build of the moment is not the WM anymore, it is the divine fighter, which with might and shield makes this fight even more one sided if the PM lost its AC.
Caster PMs without that AC are going to be fodder likewise, they will be worse wizards because they have a lower CL and have focus in a terrible school for some immunities.
I think it is unfair to say PMs are too tanky, when that is what they are designed for. They give up their offensive potential for that tankiness. Neither PM variant is a real threat to any other optimal build. Their summons suck, it does not matter if you can summon loads of them, all it takes is a WoF. So all they have is that AC and immunities.
If you take the feats away suddenly the PM either loses the AC, by foregoing EMA or autostill. Or they lose offensive power through the loss of epic foci/mummydust/edk. And I will guarantee you the better choice is to lose the latter, because they are mostly irrelevant.
Edit: someone mentioned they have a win button through touch attacks, this is false, death ward protects against the graft death effect.