I cannot argue, that in just about any fight that is not a pure Tank'n'Spank "DPS Race" --- Skill > Gear almost every time. Mechanics heavy fights, and fights that require a lot of team coordination and situational awareness are far more dependent on the person at the keyboard moreso than the gear score of the character.
That said.... I could be wrong, but I am fairly certain that a level 55 tank in "basically 63 gear" is not going to have 32-33k HP, unless maybe they are stacked for endurance with letter-mods and fortitude augments? in which case, that is even more sacrificed mitigation on an already reduced return rate in the 2.0 world. Like I said, I could be wrong, but I am fairly certain that level 55 tanks aren't hitting 33k in 63s.
Hmm, no 33k in mostly 63s sounds about right. That's what our shadow had tonight and that's mostly what he's still wearing. Shadows get that big endurance boost though.