For me, psionic cantrip mechanics are MUCH more vital than the Far Realms fluff, or lack thereof. I can hardly care less. But then I like house-ruling, campaigns that diverge substantially from the assumptions in the core books, etc. I've never liked vanilla D&D enough to be picky about this kind of thing.
With the unified caster chart 5e finally made multiclassing casters viable without being overpowered. Yet here's a "full caster" with an entirely separate mechanism and chart so that nothing stacks. Very annoying, especially a Int-primary classes are at a minimum and this one won't multiclass well with the one other one.
Well, sort of. The translation from spell points to spell slots, and vice-versa, is straightforward. So, I think making them "stack" seems doable, if that's what you want to do. E.g., a multiclassed Mystic/Wizard could use the unified table, and trade spell slots for psi points.
Or maybe I'm missing something (which is eminently possible).
in the D&D world, only a fool would assume an unarmed person actually isnt a threat with monks, spellcasters, psions, etc running around.
That would seem to depend on the campaign setting.
Occluded Mind seems to seems over-powered. "Your ally is actually your arch-enemy" ... more powerful than charm. Only one save instead of the target getting one every round. Lasts five minutes. Two enemies negated. All for two psi points.
The more I look at 5e's take on Charm Person, the less I like it. First thing I decided to chuck was the stupid "the target knows it was charmed" thing. Seems more like how Mickey Mouse's charm works when he flubbs it reading from the Master's spellbook. Never seen Obi-Wan or Luke or Merlin or Morgan le Fay have to put up with that crap. In fact, every
mundane hypnotist or mesmerist in the lit gets to say "when I reach zero, you will forget we ever had this conversation..." I'll leave "friendly acquaintance" alone for now.
Point being, Charm is underpowered in 5e, so something being better than that junk doesn't make it overpowered in my book.