I would second the concern about scorn earth. If you allow vertical surfaces, hten they can fly in many ways as long as tey stay near a wall, and inside the dungeon have nearly limitless manuverability.
Psychic reformation shold be banned. Or limited in a very strict way. One of my players tried to make a lot of powers permenant, and then reform those powers out of his array of powers. He also tried to have three feat/skill/power sets available, with the idea he could switch between them for a stepp, but not terible cost in xp.
Elocuter can be an annoying class for a DM, if you are not prepared for the movement abilities. I would be sure to addd psionic draining areas, or monsters (not a lot) to make sure he has to worry about that last psp, without which he loses most of his power. My characters learned to carry a stone that stored power points just in case.