Eh, way I see it we've currently got;

Paladin - High utility, low DPS.
Warrior - Mid utility, high DPS.
Dark Knight - Low utility, mid DPS.

When what we should have, IMO, is;

Paladin - High utility, low DPS.
Warrior - Mid utility, mid DPS.
Dark Knight - Low utility, high DPS.

And that doesn't even touch on the survivability issue, in which Grit Souleater and Abyssal Drain are just utter pants compared to Clemency and Second Wind/Equilibrium... Heck, I'd take a Paladin Cure over what Dark Knight currently offers in that regard... They could play up Dark Knights self healing, but again, I'd see that as making it too similar to its contenders, where as something like Minus Strike leaves things as is while providing a potential pay-off.