Tbh I wouldn't mind if DRK had the lowest DPS of all tanks but had a strong identity and a satisfying gameplay. Be it burst or sustain damage.
One element I wish it got back a bit more is a revenge type mechanic. TBN breaking and giving an edge/flood kind of feels like that, this was what parry and reprisal/low blow felt like. And I wish we could have a stronger emphasis on it. Be it by placing that trigger on the DRK or a target ally (just like we can put TBN on someone else).
The feeling of a tank who strikes you harder if you hit them or the one they are protecting is pretty fun and none really does it outside of DRK.