Which DRK was the best

[Reynhart]

I really doubt the heal mattered at all

Well, maybe the decision was not game changing but, in that case, I think it would have been more interesting to make the decision important that simply removing it.

True but we dont really need a combo to do that, old Blood Weapon was fine and Im also sad about the haste change

Not necessarily, no, but a combo needs a little thinking ahead in your rotation compared to a simple oGCD that will grant its buff when clicked, especially if it buffs the same chain of WS every time.

Blood and MP is a good system but I have a feeling they have no idea how to make them work together, It worked alright with TBN giving Blood but now they just feel disconnected

To be honest, I never was a big fan of Blood because it's just a red-painted beast gauge. "You build 50 by your combo, you spend it on a big hit". Oath have at least the "novelty" of not being built by WS nor being tied to offensive skills.

For me, DRK should have had a Darkside gauge, that would fill overtime while increasing damage in multiple increments, and some skills would be used to reduce the gauge so that you wouldn't let it cap, and you'd have to find the sweet spots during combat.