There's a difference between kewl powers and powergaming, though, admittedly, the OP didn't seem to grasp it.
Being able to superleap into the air, freeze time, gather a ball of immense magical/psionic/ki energy and then release it in a gigantic blast of raw destructive force = kewl power. Even if it deals 3d6 damage at 12th level.
Being able to tear through any CR-appropriate encounter in one round - unless properly buffed; then it's a swift action - and then heal any damage your lesser companions suffered = powergaming.