Going forward, it would be nice if Blizzard managed to keep the consistency with DK cards. The first issue is that they categorized cards pretty poorly, Patchwerk shouldn’t be exclusive to Blood Rune, Corpse Explosion should’ve been an Unholy, Obliterate should have been Frost, Meat Grinder shouldn’t be exclusive to Unholy, etc.
Now as for Blood Death Knights, I get they wanted them to be control based but atleast throw Unholy a bone or two and stop showing up Frost. Blood DK’s have got it all and this is just the first round of cards for them, strategies and archetypes still haven’t even balanced out but its hard to think what more they could feed them when they already have access to crazy cards like; Soulstealer x2, Blood Boil x2, Obliterate AND Asphyxiate x2, Gnome Muncher x2, Patchwerk, Vampiric Blood x2, Corpse Explosion x2 and lets not forget the REDICULOUS search and discoverability which make these cards pretty much x3 or more in some cases.
TLDR: Blizzard needs to spread the good card idea’s/power to Frost and Unholy, feels like a dev mains Blood DK and made sure they got the best cards in Hearthstone.