Fact is, I don't see any reason to use psionics at all if its only another flavor of magic (now that it
is just magic), with the same powers. It's the same old class bloat from 3.5, rehashed. It's really necessary to add a fire psionic? You already have a fire wizard (mainly evoker), a fire warlock (fiend), a fire cleric ("Light") a fire sorcerer (UA: Phoenix), etc.
I want a new class to be independant of the other classes, somewhat offering at least a different flavor of powers. Wu-jen is only other arcane, intelligence based caster. He can even cast spells without too much effort. So the question is, why do we need adding psionics if its going to be another wizard variant?
Fact is, there is a niche. The niche is the powers specifically linked to psionics in fiction. You can remove the science flavor by only
changing the names, and calling them differently, but they must have a different flavor. There isn't much place in Arcane magic for things like telekinesis (1 cantrip, 1 level 4 spell). There isn't any place in clerical magic for the same thing. But you can expand it from a psionic. So yes, a type of kyneticist would be very welcomed. Call it "Order of the Far Hand" (as ¡t was going to be called) and you are done with the "sciency" flavor without repeating the same ol' "I cast a fireball" powers (detonation). I want more of this:
that's currently absent from D&D. I want a guy who can be all Carrie-like, like a poltergeist throwing knives with its mind. I want Darth Vader choking someone with lack of faith.
Also, I want a telepath. A true telepath that could read minds, erase memories, and plant illusions on another creature's brains. I may also like a creature with clarisintience from a different kind (aura reading, psychic imprint, etc) than the wizardry type. Let the wizard have their blast. It's enough with the laser cleric stepping in its toes in medium armor.
I trully don't need another wizard. If I want a wizard, I pick a wizard.