Ok guys and gals, I'm just gonna recant. Tanks are not clearing missions faster than brutes. I was mistaken, mea culpa, my bad.
That said, tanks were still grossly overbuffed, are putting out far too much damage for being a damage secondary archetype, their speed at clearing maps is still too close to brutes for all the extra mitigation they have and I'm not seeing any kind of balance there. But these are opinions.
And facts are facts. My statement that I was seeing tanks clear maps faster because of the added AoE is not holding up to my scrutiny and testing. Even my claws/sr brute is faster on average than my sr/claws tank so I'm either misremembering what I was doing on beta before the changes went live, or something else is amiss.
Either way, I was wrong.
Edit: And the brutes are still only 30 seconds faster than the tanks on pylon times. That seems ludicrous to me.