I know people have already mentioned this, but wanted to throw in another voice for more damage mitigation. In savage especially, I'm unbelievably squishy compared to PLD or WAR (this is with tanks that were similarly geared to me). Granted, I'm still learning the finer points of cd rotation, but so is our PLD and he consistently takes much less damage than me.

I'm very happy with my aoe tanking abilities, but feel that once DRK gets into savage, those capabilities are not very useful (or haven't been yet, I've only cleared s1 and s2).

Unfortunately, I did not tank anything more intense than dungeons in Heavensward, so I can't compare savage tanking then to now, but I've talked to people who did and they are of the opinion that DRK is much less viable for savage raids now.

Ultimately, I feel that DRK does need damage mitigation buffs to be as viable in end game content as the other tanking classes.