I think the most interesting talents are the ones that trade an advantage for a disadvantage.
Zombie/Undead is an interesting one.
You need to do counter-measures to deal with the disadvantage but it also enables some new opportunities.
In practice I never heal, so that
I have no problem with it so long as the damage it makes remains somewhat balanced.
We have yet to know how damage from surfaces scales, if undead also gets healed by acid, what decay or disease does to them, or how much AI will be able to exploit this weakness.
We just don't know enough to claim the disadvantage is too big of a penalty.
