Some good changes but unfortunately they dont change much for DRK aside from the shadow wall change. A lot of these changes should have happened a very long time ago. That's ok though because these changes make improvements for DRK and hopefully they help DRK's make a strong impact on the 5.0 DRK we're all waiting for.

Powerslash: Still a DPS loss to use this move as you dont get MP back from this combo. The increased enmity generation will be HUGE though. DA powerslash at 300 potency already did good aggro but at 440 potency, yeah nah you're not losing hate.
Grit: MP reduction is nice. This needs to be oGCD though for anyone to really consider it. You still will not use Grit no matter what.

Dark passenger: The potency is not enough. You can avoid using this skill single target and it's still fine since you can swap it out for a Dark arts and not miss any damage. It's much better on 2+ targets now so there's that. The increased aggro is VERY nice though. I felt like DRK needed more oGCD enmity tools and this is exactly that.

Dark Mind:Saw this one coming. Doesn't change much but this is still a very nice change. DRK mitigating extra magic damage won't matter still since no tank struggles with magic but hey at least you're taking less damagfe (when dark mind is relevant).

Darkside: neat

Shadow wall: VERY nice change. Easily the biggest change next to Sole survivor

Plunge: more oGCD enmity for DRK and QoL? I'll take it. Not sure if I like the DA effect.

Sole survivor: Very big change. 30% Hp from killing something is pretty damn big especially if that's also 30% MP. This does change things for DRK now since you will use this move on CD just for the MP and HP restore. That means more MP and more DA in the fight, so that's very cool.

All in all I'm neutral with these changes as I didn't expect anything major. I still think it should be doing more DPS but that's my personal opinion. DRK will be fun to play and that's all that matters to me.