Ecspesielly frost, all we have is our main damaging skills, Obli, FS, HB. All other classes i can think of got some dps-skills from their talents, but we don't.
All we use is Obliterate, FS and HB... There's no CD-skills which deals damage.
Remorseless Winter and Desecrated Ground used to deal damage in early beta. Make them deal damage again could be a solution (Gorefiend's Grasp too)
I think tier 1 is nearly useless. Plague leech is a joke and Rolling blood is just another version of pestilence. Unholy Blight could have been baseline for all DK's.
What they could have done:
Remove tier 1, make Unholy blight a baseline
Move tier 2 where tier 1 used to be, tier 3 where tier 2 used to be, tier 4 where tier 4 used to be, tier 5 where tier 4 used to be. Add a new tier 5. Add three new dps skills:
For example:
Lich Kings' rage (like Lich King in Wotlk cinematic, just witout frostwyrm)
2 min CD
1 UH rune/ 1 frost rune
Strikes your weapon in the ground, unleashing a wave that deals x amount of shadowfrost damage to anything in it's patch, freezing them in their place for 2 sec.
Unleash Runeblade (arcane explosions, DK style)
1.5 min CD.
1 unholy rune
Unleases your runeblade. Deal x shadowfrost damage to all enemies within 15 yards, knocking them down.
Bone Spikes (like lord marrowgaw)
1,5 min CD.
40 RP
Summons spikes beneth 5 enemies within 15 yards. Deals x physical damage to all afflicted targets, slowing their movement speed by 50% for 5 sec.
Would look like this:
Not sure about the names tho:P