...so what exactly do we have multiple-expansions-improved invulns, 40% CDs, boosted Short CDs and Convalescence-infused Rampart for if the ONE thing tanks were shaped up to do was surviving the hits that nobody else can... is done by the other roles?

Like, congrats to the clear, I get it it is an accomplishment - but did I really need to lose all nuance of aggro management (on the tank side since Shadowbringers) and nuanced combat rotations (MP/Blood interaction, Beast gauge minmaxing) only for other roles to replace the one thing my role was supposed to be focused on? Come on man... first healers, now tanks?

Yes I know this only applies to this fight maybe and just shows how badly this fight is designed, but it is an Ultimate for god's sake... this shouldn't be possible.