So one of the thoughts I had about the Swordmage, early on, was the motes of power mechanic to give them some uses for their reaction other than opportunity attacks. Absorbing motes in order to spend them on bonuses to saves or AC is a pretty classic structure. But I'm also looking at, late game, instituting ways to expend motes gained in a fight as power to use for spells.
I'm beginning to think that providing every class with 'something' they can do as a method of recovering power in a fight, generally in specific circumstances, might be a hell of a way to go that helps sell the differences between the classes in late game.
Swordmages, for example, have to be the targets of spells to gain motes of power. But a Barbarian style class might recover exertion on a crit. A priest might gain healing through dealing damage. Things of that nature.
Could be fun. Just have to avoid the bag of rats.