After the psionic powers I would like the return of the (ki source) martial maneuvers from "Tome of Battle: Book of Nine Swords", (They would be perfect for the return of Kara-Tur and fans of Oriental fantasy MMOs) the vestige pact magic with its special game mechanic, and after... why not the chronomancers? I liked some ideas about the incarnum, but too complex to be used by DMs for no-bosses enemies.
The idea of psionic subclasses is right. I imagine the psionic fighter with the name
"psiloi", (= "nude") a member of the ancient Greek light infantery, without armour. The psionic stealth class would be the "lurker".
I miss the psionic ardent (class), like a storyteling hook to create stories about conflicts and hate-love relations with the rest of divine spellcasters. And as a subclass for clerics?
The psionic sorcerer should be the wilder, but with the options for the pyschic enervation for the Pahtfinder version by Dreamscarred Press. I suggest WotC to hire there for the 5th Ed of psionic powers and others becuase they have some good ideas. Or should the wilder be the psionic version of the warlock?
* Should the
xiákè ( = follower of xia) be the psionic monk for the fans of wuxia fiction?
* I don't imagine the wu jen as a psionic subclass, and the gameplay of those stupid taboos may be annoying.
* Paizo created its own version of the psionic powers, and I like its occultist class. I would like a psionic version of the summoner, creating astral constructs, and maybe mixing psionic and incarnum powers to summon your own monster pet.
* The fraals (little grey alien) and the blue (gobling subrace) should be psionic PC races.
* How to add the new psionic PCs from 3.5, or the sharminds, to Darksun?
* If you want a new class like the jedi knights I suggest the name "cofrater" ( = member of a brotherhood)