As someone that really does play both, and doesn't mind either, except that in 1.xx I was forced to WAR in any/every PUG for any/anything I did ...
Arguments of post-patch mitigation and eHP:
Like virtually every other comparison that one appears (I may have just missed it) to have left out the DR debuff from WAR, it is a straight DR of 10%, which is 1/2 of what a PLD gets out of Shield Oath...
Just sayin': The "almost dead even as they are" arguments all fail to account for that. Which more or less means all the "almost dead even as they are" arguments are wrong. WAR actually has an advantage ...
More to the OP:
PLD really does need a finishing hit to the Riot Blade combo, something that can be used in OTing situations as more and more the tank swapping is proving to be a thing, PLD are going to get more and more edged out for damage output reasons. Doesn't have a huge impact on most of us if we're willing to play both, but as it stands WAR has distinct advantages now. 2x WAR will outperform PLD/WAR and even more so PLD/PLD until PLD can start bringing some actual damage to the table.
Onto enmity in AoE situations:
WAR far outdoes PLD, yes, flash is nearly limitless if you Riot Blade in the middle of things, but a WAR that bottoms out TP still has flash, and they've generated far more enmity in the same amount of time as a PLD w/ just Flash to work with.
In the argument of designed to be easy peasy:
Boring design is bad design, and PLD is rather boring. WAR is more to do and more to keep track of, PLD doesn't need to not have those things to be different, it just has to have different things. The OP presented a way to use a different thing. WAR got patched into a more PLD-like tank, why not the other way around?
It's all ok, in the end 2.2 will see PLD back in the top spot and WARs will be calling for changes again, just like before 2.1 WAR were calling for change and PLDs were saying it's not needed lol. Until 2.2 PLDs will continue to call for change while WARs say it's fine as is. Nobody wants their "favorite" job to be the underdog.