Before moving on, I'll point to the overwhelming evidence as seen in other games. If you ever wonder whether it would cause trouble for group dynamics, you need not look further than FFXI and the princess Bard/Red Mage.
I'm not sure why WARs from 1.0 would have anything to be frustrated about. WAR in 1.0 was the tank of choice by a mile. It ran all of the relevant content better than a PLD could ever hope for (Garuda HM, Moggle Mog, every dungeon that needed to be speedrun for relic drops); even after the nerfs to Steel Cyclone.As for the WAR, I completely agree but the problem is that Yoshi has already openly stated that WAR is functioning as intended and which really makes it doubtful they will change how the class functions, even though it really should be nerfed. Yet if there is one thing SE is scared of, its nerfing WAR players that are still carrying their frustrations of 1.0 and DRG players griping about having to use positionals.
I'll agree that the tank and healer meta is all sorts of messed up. Some people like the l337 d33pz, but yeah, people don't roll tank or healer to deal big DPS. It's really a bunch of design oversights they've sort of let sit to fester. SCH being able to DPS didn't help, and the fact tanks are even capable of tanking outside of their tank stance (something absolutely unthinkable in other games) only makes it worse.