This is probably my favorite expression of psionics since at least 2nd edition. It's not perfect by any stretch of the imagination; I think they're trying to cram too many disparate concepts into a single class here, for instance, but from a cursory reading it looks great, and looks like it will be a lot of fun to play.
Some thoughts:
+The whole skill-tool-language self-reliance bit actually fits really well within the concept of the character they've presented, but...
- ...it tends to not play well with the whole group dynamics thing. Maybe if it were a little harder to do. It's nothing that a Knowledge Cleric can't also do, but at least they have limits. I'd maybe scale back or put some kind of limit on what the Mystic can do; maybe not as strict as the Knowledge Cleric but more than at-will forever.
-Haven't gotten a chance to get through all of the disciplines yet, but I'm noticing a dearth of what would be considered "rituals" for other full spellcasters. No teleporting over a mile (and it has to be in line of sight!)? No astral projection/travel?
-Not entirely certain why Soul Knife is the only subclass that gets free proficiency in martial weapons. Why not just say you are proficient with your own soul knife?
+These are exactly the subclass archetypes I would have chosen; you basically have Ardent, Psion/Telepath, Psychic Warrior/Egoist, Nomad, Soul Knife & Wu Jen/Kineticist. Seer seems to be split between the Awakened & Nomad disciplines, and frankly I'm okay with seeing Metacreativity go out the door.
-It would still be nice to see a Psychic Warrior & Lurk archetypes for Fighter/Rogue respectively. That said, the Nomad's abilities seem a bit underdeveloped (or at least as focused on the short-term/short-range as the rest of the class) due to the lack of "ritual" psionic abilities. I also miss some of the more niche movement powers, like skate or the Elocater's scorn earth.
+That said, there's a lot of versatility and flexibility here. I can see how I'd use this class not only to recreate some of my older psionic characters, but also my old shujenga, or my old incarnate. Possibly even my archivist, with a little reflavoring.
-There are some neat Psionic Talents here, but I think I'd like to see at least a little more here.
-No psionic ruleset is complete without a Wild Talent feat. It'd be easy enough to houserule one, but it'd always be nice to see something official.
Overall though I really what they've done here. Pretty excited to see a final version finally hit print.