Ok I never heard in PVE world this trait is OP as master trait.
Most of the dungeon builds don’t take it anyway, WvWvW I guess nobody cares there also, specially not ANet they have not intention to balance anything there (look condi bombers, perma steath thiefs).
So any group that can complain about EAtt OP at master can be PVPers. The thing is I can’t think my ele without EAtt, this what make dancing in the attunements so fun.
So who cares, Ele get 15s might, 6s regen, 6s Swiftness, 6s Protection if the problem is AOE effect, so PVP team gets the boons then took the AOE from baseline skill and put to GM tier.
So EAtt without AOE would be there baseline and if somebody think AOE must have for GM tier then they will invest there.
But at least that something that defines Elementalist will stay with the Elemantalist.