With the information laid out by others, specially at the fact that the Baseline AoE changes would affect damage (New knowledge every day), I would personally also give an opinion that perhaps something should be done with the Overcap damage reduction.
Tanker definitely at Live does far more AOE damage compared to Brute, even at low target counts, so it makes sense to reduce that as best one can. However, as the data shown, Tanker doing *Less* than a Brute at their target cap, also feels bizarre.
Ideally, I feel that Tanker at their new target cap, like 16, should be really doing the same OR slightly more than a Brute does at theirs, like 10.
Brute, with just the area factor math changes, alone already will be doing more damage per target than Tanker. With that, Tanker doing the same amount of overall damage, but on more targets, just seems to be a proper balancing point. Less targets, Brute wins out, but more Targets, Tanker is either more efficient or even slightly better... And as enemies die out or smaller groups are engaged, Brute starts to pick up wind.
That be my two cents at least from the info I seen on the thread so far. :0
Reducing Overcap reductions or even removing it, all so Tanker has EQUAL damage to Brute on target cap AoE scenarios, even if the target caps are different.