Actualy that the problem with most of our special characters, low armor and no ward.
It's weird, isn't it? The only ones who do are stuck with 5+ ward, and they both are insanely costed, next to generic builds. Even taking into account the shake-up that 8th edition generic magic items caused, I'm not sure any of them were much better prior.
Skull taker... sheesh no wonder he died,
we probaly need a tooled out Oldblood to even have a chance against him.
Gor-rok is more like a scar vet Special character.
Not to mention magic. Then again, Daemons are broken as hell, so don't feel bad

I feel bad for Gor-Rok, because he's the only named hero that comes close to being worth his points. His forcing of re-rolls to wound is hilarious, as is immunity to HKB and KB (so at least he can fight Grave Guard without fear). Re-rolling to hit in the first round of combat is definitely helpful, especially as he's stuck at S5.
However, the twin problems of no ward (meaning while gimmicks like KB can't take him down, everything else can) and only S5 (a meagre amount of points upgrade a regular Scar-Vet to S6) let him down.
Plus, like a lot of our heroes, because we up armour them to take advantage of Scaly Skin baseline, they're good targets for sniper spells (Death magic, Golden Hounds etc). At least generic Scar-Vets get the Talisman of Preservation or Armour of Destiny, Gor-Rok just forces re-rolls to wound and hopes you don't manage more than 1 wound on him.