I recently started doing RBGs, currently ~1900 MMR.
I somehow prefer playing unholy to frost - I really like the numbers with diseases popped at the right time and overall pressure I can do.
Would switching to Frost help my team? Can a well played Frost DK do even more damage? Or it's maybe less damage but more useful dmg - since eg. obliterates hit 1 target much harder so easier to get a kill?