I've noticed low damage, not horrendously so, just used to GSL CRs blowing others out of the water,and the damage makeup is pretty wrong. It was doing alright, but just played an rbg and the oblits were 1/3 of another dks and it did twice the amount of frost strikes. i'm 2h frost so oblit should be prioritized more, I recall that's a change you made.
Edit: It could just be that less frost runes are available since the CR will purge with icy touch, and that's not something the dk I was comparing myself to was doing, but yeah, the amount of oblits seems kinda low. Perhaps i'll try disabling purge in rbgs since it isnt quite as valuable a thing as in arena.