I honestly don't understand why people "want HW DRK back" asides from having a severe case of nostalgia goggles.

HW DRK had a good number of problems that people didn't like, some of which are still around and people are still complaining about.
Shadow Wall being the worst of the big tank defensives, Living Dead being unnecessarily convoluted in comparison to the other tank ultimates, Unleashed and Abyssal seeming redundant, Sole Survivor being far too niche and not useful in most boss content.
All of these things existed in HW, it just happened to be that the problems with PLD in regards to job balance overshadowed any complaints about issues that DRK had.

Sure DRK got really messed up with the SB job changes; they removed far too much, left too much of the stuff that was janky or not very good and didn't add enough new good stuff to compensate for any of it. That doesn't mean that everything that was changed or added to DRK with SB is garbage and should be scrapped. TBN, ignoring arguments about DPS losses/gains, is a pretty damn cool ability. Bloodspiller and Quietus, after the MP restore effect was added, are also both welcome editions as well.

Believe me, the "HW DRK" would not nearly be as great as people may think in the environment of the game at this point. It "worked" then, mainly because of bigger issues with other jobs, but wouldn't really work so great now.

So instead of just providing feedback like "I want HW DRK back", dissect the problem. What exactly was done that makes DRK feel lacking or less fun to play now? Would reversing any of these changes actually really "fix" DRK in the ways that it needs? What other ways could the problems with DRK be addressed?