In my opinion (and this mostly pvp oriented):
1. Defensive cooldown. Give a defensive cooldown for unholy and frost DKs. Icebound fortitude could be replaced with something like an ability called frost giant that would go something like this. "Become a berserking frost giant and generate your own weapon of pure ice making you immune for disarm. This would increases your damage by 10%, reduces all the damage done to you by 40% and make you immune to stun (but not for snare) for 10-15 seconds. 3 minute cooldown" The same thing for unholy. It would also only be usable in desired presence and couldn't be used at least with pillar of frost. I don't know if this would be too overpowerd or not but at least it would do the trick.
2. If number one gets through reduce the damage of obliterate slightly.
3. Make purgatory passive for blood and replace the talent with something else.
4. Make the unholy pet stun not to cost energy and disable its global cooldown.
5. Less stacks required for unholy infusion. I'm suggesting 3. Also fix the incapability of the pet using its brain regarding movement.
Pve is fine, I think? The most mandatory thing right now for us would be something that would keep us alive without a pocket healer. What are your suggestions?
General thoughts so far:
No rune cost for utility spells like strangulate, pillar of frost
Buff Icebound Fortitude - No runic power cost and increase the reduction
Revamp tot and motf - make DW and 2h more alike
Boneshields for everyone!!
Make the talents more interesting
Add raid utility for blood DKs
Nerf burst, more survivability