You can imagine, but you and your group know that Goblin insanity only last for short amount of time where tank take absolutely ZERO dmg by time they are kill in time, and Paladin don't make that deal happen as easy since they can't perform well in multi-target damage.
WAR and DRK is the reason your group has no DPS problem. Many seem to forget that PLD have of course strongest CD, but the recast time is insane long, and they have absolutely no way to leech HP, and that enough to stress the healer by a huge factor.
Hallowed Ground is best Tank CD ever, but is 7 minute recast for a little 10 sec invincible. Sure that would be way superior if A2S had ONLY one massive wave to handle, but the fact is, A2S have 9~ Wave, and last 10 min long, so is good if you can use this once. (Unless you insist to use HG on the first 2 golin in the initial pull >.<)
Now i don't know if you ever tght about it, WAR in defiance have 25% MORE HP and 20% healing bonus, is the same as having Shield Oath active. (Of course is not working for lustrate, but do we really care? WAR with 5 wrath get 10% Crit + Internal release = 20% + they base Crit Rate, pop berserk and hello 6 to 11k HP return with Equilibrium then hello 2~4k HP with Second Wind, and that is every ~1 min >.>
So what else is left to compare?
Sentinel(40% for 10 sec) = 3 min recast, can be use 3 time max in A2S
Vengence(30% for 15 sec) = 2 min recast, can be use 5 time in A2S
Rampart(20% for 20 sec) = 1 min 30 Recast, can be use 6.5 time in A2S
Inner Beast (20% for 6 Sec) = 22.5 sec Recast, can be use 26x in A2S (And i am ignoring the FREE one you get every minute with Infuriate etc..)
Raw Intuition (Parry 100% for 20 sec) = 1 min 30 recast, can be use 6.5 time in A2S
Bulwark (Block increase by 60%... for 15 sec) = recast 3 min, can be use 3 time per A2S
Hallowed Ground (Invincible for 10 sec) = Recast 7 min, can be use once per A2S
Holmgang (HP can't go less than 1 HP for 6 sec) = Recast 3 min, can be use 3 time per A2S
Storm's Path is yet another 10% reduction on single target.
Rage of Halone, reduce STR by 10%, so is very similar by time monster is not magic.
Thrill of Battle, increase HP by 20% for 20 sec. (every 2 min)
There is Nothing like that on PLD.
So ya, if you pay attention to this, you figure quick that PLD have for fact stronger CD, but the recast time penalize them by a lots, and if they are constant active tanking, they are quickly left with zero CD.
Anyway, i never asked to FIX PLD Deffense/Recast time, i can deal with that part, but the lack of AoE DMG make the job feel totally rubbish, like there is no "DEFFENSE" superiority in trade of low DMG, that is mega false statement that people keep bring back.