Gonna revive this.
Cause it's 2025. And it's about time for this modern MMO convenience to enter the game.
If they are gonna continue to release new power sets, they need to provide a way to use those sets without needing to completely remake a character.
Cause to head off the "Just make a new character" crowd, the gameplay loop is not varied or engaging enough to support a grind to full build every time a new power that works more interestingly for your character concept comes out, not after the 10th or 11th time. You know it, I know it. You spend most of your time playing the same content with a group of friends or hanging in the D, go sit down. The game will survive a bit of modernizing.
You'll still have to farm out new Enhancements for each change anyway, there's plenty of build in user retention without needing to make a whole new character.
It's just good UX. It's time for this feature to exist.