Shadowmourne is NOT the ONLY reason why "BIS" Blood DK will out damage a bis Frost DK.
Short fight and big 3min CD like Hysteria will. Give Hysteria to a Frost DK, or make a 35% hp or less phase of the boss fight last a bit longer, see what happens...
While we are at it, I would LOVE to see your version of "BIS" Blood DK that u find so good.
Oh, let me try asking again, even tho you lack 10% Attack Power buff inside Shadow Realm on Halion 25m hc, why did I mainly see a FROST DK inside, doing awesome damage (if he actually knew how to keep rotation while running in circles), rather than a BLOOD DK (I rarely, actually almost never saw one, if I was not the one trying it out)?
"Every DK tank has Improved Icy Talons so Frost is not providing anything to the raid..."
"Basically if you are Frost DPS, just respec to Blood or Unholy, you will do the world a favor."
So much for not saying Frost DK is useless. :D
Also, I really don't remember every raid I was in having a Blood DK tank with Improved Icy Talons as a main/off tank.
Who do you call if you don't have a Blood DK tank? A Blood DK DPS?
I just hate seeing Blood being lifted as a "good" DPS spec, where THE ONLY WAY you make it compete or "viable" with other builds is to add SHADOWMOURNE in the weapon slot and hope fight wont last more than 2.5min.
You don't have Shadowmourne? Your BEST DPS spec is: "FROST". The End.
I also LOVE to see an occasional Blood DK DPS players with around 5.5k gear score in VoA 25m doing less than 5.5k dps fully buffed.
Next time before barking how Frost is BAD and Blood is BETTER, maybe back it up with some actual in game proof. :)