Destructive Channeling +2 penetration +20% damage affects pen/dmg of spells - bur or intendend?

[Silvaren]

Like the topic says (sorry for my spelling mistakes), modal skill from scepter proficiency affects penetration and damage of spells. Is it bug or a feature?

 

It would be good if description of Destructive Channeling shows amount of raw damage it does with every attack (it inflicts no damage while casting spells, only during base attack with the scepter but grant benefits to both types of action).

Edited November 20, 2017 by Silvaren