Sorry guys but if you think not being able to wear an helmet is a disadvantage that needs some extra powers as compensation, then you haven't seen the helmets that are available in the game. xD None of them are super powerful, none of them give any unique stats or anything like this. For me the fact that godlikes cannot wear helmets is a purely cosmetic and lore decision.
I had my first playthough with a godlike character and didn't feel handicapped in any way. The character was still more powerful than the followers.