you are actually wrong, i want this sort of thing, being hit by the boss must'nt means insta death! healer must have other stuff to do instead to overheal tank and toss area heal when the boss do aoe.
we must have epic fight that will ask us to think to a way to overcome the fight. in past often the offtank had a really important role, even dps had some role that was often...crazy.
i will take wow as exemple, because it's what most people have know. the fight right before Gruul in burning crusade, where you had a mage tanking! it was insane! but was asking the group to think to a different way to approach the fight.

sadly in FF14: ARR we haven't any of this sort of crazy thinking... we haven't any... pfff any team play actually. we are 8 people doing our stuff and praying that everything will go well... because if you are hit, you are dead.

and i don't think he was using this example for the fast paced reflexe based fight, but more about.... the AI that need to be more deep and more... human like. indeed we ask for more random and it's possible to do it on fight like titan and such... because they are design for work like a scripted fight. in a random fight, you have rarely any instant kill attack, or it's one that will be counter by a stun or will ask some technic for avoid it.

what bother me, it's the fact that they don't devellop the deepth of them fight and simply give us the same stuff over and over and over. it's not fun, we must have the feeling that everytime we face a boss, we can die, because we don't know how the whole fight we go! because the boss will act randomly a bit... why not even don't have the same setup of attack each time. like one time he use a big axe and the next time he use two fast sword with different attack!

we are in 2014, a loooot of work was done in the video game for improve the AI of the monster... it's maybe time to do it in FF14: ARR... sadly, i think they are limited by what they can bring because of the ps3 that have soo little memory and they can't add too much developped AI because of this. that the only reason i can see why we get soo little AI improvement in the game.