Instead of multiple pools, lets just have 1 huge Pool.
Some powers duplicated to give themes like a Magic Aid Other.
Level limits for some of the overpowered ones.
OR
Personally, I think that the pools need to be redone from the ground up. They should have at least 2 group friendly powers, 2 self boosts, and a situational power.
There should be a defensive power, offensive power, and a utility.
I think that Experimentation is fairly balanced and useful. Boost a teammate, poison enemy, fast travel, AOE Attack, and a Self Boost. Shame it doesnt get used more.
Medicine should have a Team Heal Field, a short range Stun, a Heal, a Self Heal, and Rez.
Willpower should have a Self and Group Resist Fear/Confuse, a taunt, a Fear, and passive Team To Hit bonus.
I know that I would not look forward to trying to balance it...