It is odd that a dretch can kill a turret but nothing else. Is the argument for this that dretches could just hide behind something and kill it, making it too hard for humans? I don't see the point. :-?
As far as being able to kill a blueprint, I know it works for turrets, but I don't even hear a bite sound when I try to bite a reactor or whatnot. Any confirmation on this one?
I think this needs to be straightened out one way or another. FWIW, i think dretches should be able to attack all buildings, because as far as I can tell there is no good reason for them to be unable to.