@Radmantem
1. Zombie now unlocks a new unique at Gear 10 which gives her back the infinite revives, and also gives her the sacrifice mechanic.
2. Acolyte appears to have 'permastealth' because she has a 90% chance to gain stealth for 2 turns every time she uses her basic. That mean that 10% chance to NOT gain stealth has to happen twice in a row.
I'm not a math wiz, but I think that means there is a 1% chance to lose stealth once she has it. That is assuming she is using her basic and her stealth isn't dispelled by your team.