my opinion as a filthy casual.
Lets forget you have a healer in the party and look at PLD and DRK when they are alone.
DRK is not a good tank for big pulls but is good for mt raid boss. TBN + oblation can make any tankbuster hit 0 (even with some vuln stacks) and that feel so good! And since raid bosses hit way harder, but less frequently you feel safe since you just took 0 dmg and still (probably) at full hp. But when you are surrounded by mobs hitting you (low dmg but frequently), taking 0 dmg for 2 seconds doesnt feel good as there is no other way to regain the HP you are losing while TBN is on cooldown. You can use Abyssal Drain to refil around 30% of you hp, (around 50% if everything crits) but thats every minute... and TBN still on CD. You can use Walking Dead and be damned after 10 seconds.
PLD is good for big pulls but not good for mt. There is no shields on him so you remain on sheltron/ramp/sentinel to mitigate the dmg as much as possible and let the regen/clemency refill your HP after the blow (but the dmg will never be 0, so you may die if you dont pop HG...). But in big pulls you can pop HG and be free for 10 fking seconds! you can pop this in the first pull of the dg and it will probably be up by the first or second pull after the boss! And you can just forget to dps and use clemency 5x thats around 20% of your hp each cast (if it crit 30% [without reqcat]) and let the DPS kill the mobs!
You are a TANK. if you die, then everyone else dies.
Thats how *i see* PLD and DRK, extreme opposites. One mitigates through shield (DRK), the other through healings (PLD). One has to preemptively mitigate dmg (DRK, through shield) and another has to mitigate after the dmg (PLD, through healings).
(i wont talk about WAR... he is an alien. nor GNB.)
I dont fking care if PLD is 10% lower on dps mark. I could still do both ex-trials in EW as a PLD, with any party comp.
"ooo but the next savag-" IF paladin is rendered useless over all other tanks (which is ridiculous to even think about it.) such as 'not enough dmg to beat dps check BECAUSE of PLD' or 'not enough mitigation to tank swap' (or wtv bs...) then i would enrage on SE to buff the class or nerf something. But as it is right now is nice and acceptable.
I do have some complaints in all the tanks, some boring stuff that make me wanna punch a spike wall. But thats balanced with the good stuff that almost makes me C**.
Thats all i have to say. Change my mind.