I do think that the way the meta is set up, certain playstyles and even ATs can be at a disadvantage.... but at the same time that same meta would be made even wonkier if they were to just receive straight buffs.
What if there were a "Super Heroic/Viallainous" difficulty mode that made encounters tougher per lvl difference lets say (Purple Patch scaling x1.05 or such), but it also came with some bonuses to your characters as well?
For example, in the Super Heroic setting, a +3 enemy gains +Regen, +Defense, +Damage, and +ToHit (not acc) along with say, 1 extra power or something. This makes them inherently more dangerous and a bit tougher to take down. But in the same setting, Controllers and Dominators now gain -Res/-Def on all their control abilities that can counter these traits to make taking the enemies down easier (boosts offense!) while shutting down their own offense (team defense!). Buff powersets would also see more use as the Soft Cap effectively changes / other boosts are more valuable.
Thoughts?