I still don't understand exactly why it, and most powers in general, has to have a penalty. We spend our time leveling up to acquire new penalties? That's hardly an incentive to level up. We want to aquire nifty new powers and the powers should work, you balance them via endurance costs and recharge times. Rage is superior to Build Up? Well it is in a generally weaker powerset, there is the balance. I don't see that it necessarily needs another huge drawback piled on top of it.
Supes doesn't get all weepy after using his Heat Vision
Wolvie doesn't curl up into the fetal position after popping his claws.
Bats doesn't blubber after angsting someone to death.
