I would use psionics as a side ability, like in 1st edition. But don't get me wrong, I wouldn't use 1st edition psionics...those were broken. Trust me, I've played two characters from 1st edition with psionics...BROKEN!
But basically, if you could take a feat, Wild Psionic...then have access to psionic skills that are bought as cross class skills...then exercise certain limited powers based upon those skill ratings. I would be in favor of that.
But I don't want psionic classes and such. I just don't like them to be that pervasive in my game.
Cedric