I guess I'm one of the vocal few who thinks the Far Realm narrative is really unfit for psionics as a monolithic narrative choice.
I honestly am having trouble getting past it. Like, "Do you want to play a character whose mind has been awakened by the reality-warping powers of the Far Realm?" just seems like I shouldn't be using the class if I'm not really interested in a Far Realm focused game, which is a weakness that, say, Wizards and Rogues and Clerics and Fighters and Paladins don't have. It doesn't gel well with the pseudo-new-agey / 60's counterculture / "The Men Who Stare at Goats" vibes that psionics gives off in general, either. Narratives of psychic power in fiction come from human potential - "new" powers arising, evolution (like dark sun), breeding/genetics, monastic enlightment, "secret government programs," etc., etc.
Clearly, folks are cool with this, but my interest for the class pretty much bottoms out at any mention of the Far Realm. I don't want my dude who can read minds and enhance his own metabolism to have to be linked to some distant tentacled threat from beyond the stars. I'm cool with my Old One Warlocks doing it, but as a whole class, that's a pretty narrow narrative.