I haven't got the glass cannon perk yet on any of my characters but they AI knowing that your player has it and focusing seems broken. I get that on tact mode they should be smarter but not abusive/exploitative of a perk. I was really just saying if your hiding your undeadness by wearing armor the enemy shouldn't know at least right away, 2-3 turns in they clue into that your missing skin would make more sense.