Too many men and crabs in this post.
WAR is not "required" for any hard content. It is just that WAR is so good that there is no group willing to run without one. Same thing can be said about SCH and DRG. For the entirety of 2.x, this was also true for BRD, but MCH gave us another option.
Also while WAR was mathematically better than PLD as a MT in 2.xx, most groups required the PLD to MT. I was one of the few WARs to main tank during progression of SCoB and FCoB. In situations where I switched to DPS was because our PLD didn't play a good DPS for solo tank content. But that doesn't change the fact that the majority of the community demanded PLD main tank (just like how they demand a WAR tank in any tank composition now).
Yeah, but we're not saying these issues shouldn't be fixed. What I'm personally saying is this should be fixed without "breaking" the balance. You don't "balance" a class based on the current content, you balance it against the other classes. As I said before, DRK is in a good place only because the content allowed it. If the content had physical tank busters, DRKs will be the tanks on these forums demanding defensive buffs (which they need, mind you!). PLD getting the offense of the other two to fit in today's DPS race of Alex.Savage (which is what most paladins are asking for) would simply shelf one of the other two tanks permanently (Read: DRK) as PLD would have defensive superiority AND the same offense as DRK or WAR (whichever SE takes it up to).
The way this should be fixed is not by making PLD stronger, but by making it so there is an actual benefit to non-WAR comps. Right now, whatever small benefit you get from DRK + PLD setups just wanes compared to WAR's overall raid DPS benefits. That's not even taking Storm Path into account even though its benefit is less than what people make it.
Storm Path is great and all, but due to the multiplicative stacking nature of buffs, on busters the 10% damage from SP is reduced by whatever % of CDs you throw (Veng + IB is 44% so SP is actually reducing damage by 5.6% on that buster) and with SCH + WHM doing Medica 2 and Indomitability or Emergency Tactics + Succor will top anyone off even if they were critically low. SP is nothing to laugh at, but it's not the holy grail of all utility as people make it.
An example fix would be making the slashing debuff available to DRK (If it's not feasible on PLD). Two of three tanks having it means you will always have it no matter what composition of two you have, unless you run double PLD.
In my long post on the other thread, I suggested removed clunk from PLD utility and added utility to DRK. If PLD/DRK combo adds safety that any WAR comp doesn't have, people will consider them. Along with the above Slashing R. Down suggestion or inclusion of NIN (PLD+DRK Don't need monks) and you have a "solid" set up.
TL;DR: We're not against making all 3 tanks wanted, but buffing PLD's DPS is not the way to go.