This is more a musing than anything, but felt it might add something to the large amount of tank vs tank class discussions happening on the forum right now.
Looking at the Paladin's Crossclass options, they strike me as the weakest and least essential of all three tanks. Obviously Gladiator itself has some strong skills that can be cross classed by the other tanks (Provoke is Mandatory, Convalescence is the strongest of the crossclass tank cooldowns, Awareness has situational use and Flash is pretty good for Warriors), but Paladins are stuck with Marauder and Conjuror.
Marauder crossclasses have always been fairly meh, a "well there's nothing better" option. Foresight is only about a 6% damage reduction from physical only, Bloodbath is okay but far weaker on paladin than warrior even ignoring the trait, Mercy Stroke is free damage. All three of those are okayish but you could easily tank without them and not notice any real efficiency loss. Fracture was okay in 2.0 but completely worthless in 3.0 due to the new dps skills and is now always a dps loss to use.
Which means on top of 3 average-to-meh level crossclasses, Paladins have two slots they can use for Conjuror skills. Stoneskin had awesome use in 2.0 but with the addition of Clemency now its use in combat has diminished slightly, and Cure/Raise/Protect are all pretty rubbish (I go with Protect to speed up prepull buffs and occasionally help out healer mana when someone is ressed).
Again, it feels like Paladin is the tank where the five crossclass slots matter the least compared to their kit at 60, and you'd struggle to tell the difference in practise between a Paladin with all 5 and with none slotted.
I understand Conjuror is a requirement for plot/lore reasons, but I wonder if most of a Paladin's current perceived ingame problems could be solved by swapping Conjuror for Lancer.
Paladins have TP issues at 60 currently - being able to Crossclass Invigorate would completely fix this. Keen Flurry is another "okayish" tanking cooldown like Foresight, and would help a little as it's minor free mitigation. Feint has incredibly limited use but very few classes have anything which can apply a slow so for the mobs it works on it might be decent. Blood For Blood also would give them a small DPS boost when offtanking (at a cost, as you wouldnt want to pop it with aggro on).
Perhaps DRKs could benefit in a similar way by having Lancer as their option instead of Marauder. I'm sure BFB, Invigorate and Keen Flurry would be more use on a DRK than Foresight, Bloodbath and Mercy Stroke, as bloodbath doesnt work on their magical damage, they have their own version of mercy stroke heals via Sole Survivor, and Keen Flurry wuold provide similar mitigation to Foresight whilst enabling more Reprisal procs. BFB feels like a DRK-themed skill, and Invigorate would solve their TP problems like Paladin.
I know this is just musing and will never happen, but part of me thinks that if Paladins/Dark Knights got Lancer as their cross class skills instead of Conjuror/Marauder respectively, it would pretty much solve the bulk of the issues that tanks are complaining about in comparison to Warriors without really needing any nerf/buff to their own kits.
TLDR: Let PLD and DRK have Lancer as one of their two crossclass options and it will solve most of their TP/DPS/Utility gripes compared to WAR.