What other role is there for tanks???
Effective tanking POST ED now means taking FULL Advantage of any terrain benefits you can get. Moving around corners, essentially forcing the aggro'd crowds to bunch up.
It's even more critical that team members FULLY understand what the tank/tanks are going to do, and WHEN to launch their attacks. I single blaster can ruin a mob cluster and virtually get the entire team killed if the mob scatters.
For me - my Fire/Ice tank = using BLZ Aura to get aggro, find my corner or pillar or other hiding spot (inside crates being best) then ice patch to lock the mob down, then BURN!! They 'try' to run from burn, but Icepatch keeps em close. If the blasters..etc..etc.. wait until my first burn runs for a few seconds, their AOE's will often take out the majority of the group.
Getting to the 'hiding' spot is definitely more dangerous without the damage res. Damage output is JUST enough to try to maintain aggro... but.. squishies still die around me all the time.