i would even take a stamina chains morph that does little to nonexistent damage but in turn applies major fracture/breach

A/ Molten whip should have been stamina since 1.6. I fully agree !

B/ Put back the cost of Banner and morphs at 200 since :
you have to be closer now to activate synergies
1.6 brought root immunities and counters options
cost increase for a double nerf is never a good decision (triple nerf)

C/ Restore Heavy Armor "Constitution" (resources) and "Juggernaut" (+7% melee dmg) passive. It is not specific to DK, but DK is well suited to a (working) Heavy Armor since we have to stand our ground or die in PVP.

D/ Give us something more in terms of taking damage since we have no "glorious" escape mechanism in PVP like sorcs and NBs

E/ Change the useless "Elder Dragon" passive to something useful like "30% cost reduction to stamina abilities and mechanics (sneak, sprint, roll, break free) for 6 sec after being victim of a root, stun, disorient or knock down." Considering the free and permanent 20% stamina boost to sorcs in 2.1.2, I would just find this fair.

F/ Change Cinder Storm to be PBAOE again (arround the caster) with Major Maim (-30% damage) for meleers and leave eruption targeted for rangers and add Minor Maim (-15%)

G/ Fix flame of Oblivion so that it actually keeps working in WWolf form like all other buffs, Fix Leaps so that we can use it in intense battles without "freezing" but not jumping. Fix the unbreakable Fear bug.

H/ with lag and the change to the range to trigger synergies, the nerf to talons has became unnecessary, especially since we have since update 6 several unroot and root immunities options. Restore the 7 range on talons.

I/ Restore the original duration of Magma Armor and morphs to 10 seconds.

Tbh, I've tried to make Stamina DK work in pvp, doesn't seem like it does since DKs lack good bursty class skills outside of Wrecking Face Leap... simpleton spam button skills.

DK is meant to be a DoT-based class and a sustain/tank build, stam builds don't do any of this only magicka.

and also Magicka DKs have the only heal skill that DKs can get (outside of vigor/rapid regen) which adds even more sustain... Burning Embers.