This is utter nonsense! Sacrificing a skill slot and wasting time for just one perk? O_o... It's perverse... If you do this, you'll have to give something up... Can you tell me what?
I rarely max out more than four skills, so the lost skill slot isn't that significant.
And summoned creatures will be sent to the void with just one wave of Orcs (+200% damage).
So, it's quite good.