The point being missed is that UTILITY comes in many different flavors. PLD's can be defensive in nature, WAR's can be offensive in nature, with the other tanks having something like perhaps GBK can reduce recasts, or shorten cooldowns or something like that. It doesn't all have to be "All tanks have shields...there, you happy? Utility! HAPPY NOW?!?!" where everything is "all the same". Could be interesting. Nothing crazy, but interesting. Maybe give each tank two utilities or so.
Tank swaps should be organic and feel good happening, like there's a rhythm in the fight, and each tank is strategically playing off of the other one, both working as two tanks, one unit to achieve a common goal, like a buddy system.
Each tank should feel GOOD to play in off tank and main tank role. All tanks should have something to do, not like the OT just sitting in the corner as the "blue dps".
Make each encounter have adds or two bosses, or have each tank take a debuff, or deal with 2nd enmity mechanics (you wanna force the enmity thing? "Tanks and enmity are boring!" make more 2nd enmity stuff to manage aggro).
It feels GREAT in 012s, tanks having to manage aggro, swap often, take turns eating the TBuster, it feels great! We need more of that interactivity.
Alex Savage was before my time, but it seems like there was some tank shennanigans going on as well, maybe some of that?
Point is, there are TWO tanks in EVERY encounter. So you will run into situations with TWO MAIN TANKS in DF stuff... what are they to do then? You see where this is going? What if two main tanks or two off tanks are in an instance and poorly balanced? What if they don't have the tools to get the job done because we know the dev team overlooks SEVERELY punishing flaws, like 2.x WAR, 3.x PLD, 4.x DRK?
Every tank should feel good to play in the MAIN TANK and OFF TANK role, no role should be partitioned off. PLD never gets to pull, and therefore hardly ever gets to MT, this is a HUGE problem. All tanks should be able to pull, MT, and OT, and it should FEEL GOOD DOING SO. There should be something to DO with both roles, and it should feel good to Off Tank and Main tank, you should feel like you are DOING something, and CONTRIBUTING.