So uh...
This is a lot of "But what about MY GAME?!" and the answer is, as it has ever been "Your game. Your rules."
Thanks for warning me what's coming. Your game, your rules. On this point I like the official rules the way they are and think that changing them would be making them significantly worse.
You wanna use the Aberrant Mind as the only "Psion" at your table, cool. I'd rather have a Psion Class.
Then house rule it. Your game, your rules. I like the way the official rules are right now.
You wanna use the standard Spell List as the only "Powers" at your table, cool. I'd rather have distinct powers.
Which is when we look at subclasses - like the existing ones of the Soulknife or Psi Warrior.
Somehow 5e manages to do things both ways
at the same time and people are complaining about both at once, each as if the other one isn't there.
Also: Arbitrarily complex is -just- hilarious. Literally any new system or feat or spell or race or class or even archetype makes the game "Arbitrarily more complex" than it is. "Games made worse" is similarly just adorable 'cause there's nothing about Psionics that by it's nature makes games bad, unless you just personally -hate- Psionics...
Every new subsystem makes games worse because they make the games harder to learn and more confusing.
This doesn't mean they don't
also make the game better because they do good things. But the burden of proof for a new system is on showing it is a good thing. And it's something that's harder to do when the archetype is already covered. People who want specific psionic mechanics already have them. People who want psychic powers as spells already have them. It's only want people who want their specific take on psionics that don't.
As to your Reddit Googling: Google tailors results to your search history and social media presence. My first three when inputting your search parameters ("r dnd psionics site:
www.reddit.com") are "What are Psionics in D&D?" "Psionics in 5e" and "Why are Psionics so Hated?". Hmm... Wonder if you thinking psionics as a separate system from "Just being spells" automatically making games worse and overcomplicating things might have any kind of impact on that...
So what you're saying is that even with your own personal search history and social media presence your top three includes one about why they are hated, one showing almost no interest, and a couple of almost dead entries?
And no I don't normally write much about psionics in D&D. I don't think I ever really have off this board.
You don't -have- to play in Eberron just 'cause there's an Eberron book out there. You don't -have- to play with Psionics if there's a Psionics book out there. And even if there is a Psionics book out there and you do play with it, you get the final say. But unless there's a book out there that actually, y'know, adds a Psionics System? It'll leave people wanting.
There is already a D&D 5e psionics book that has been published. It's called
Tasha's Cauldron of Everything. And it's the best psionics book there has been in any edition of D&D by a pretty large margin. In part because it
doesn't drop ridiculous numbers of rules on everything if someone wants to play a psychic character.
Tasha's of course didn't have the first psionic characters in 5e; we had the Great Old One Warlock in the PHB and the College of Whispers Bard in Xanathar's.
A tiny number of people seem to be left wanting by it - as far as I can tell it's those who for some reason want utter perfection and aren't willing to accept anything less than it despite not having a coherent design. Those who, despite there being a literal power point using subclass that uses spell like abilities and power points think that a taste of the far realm is too much and are going to throw out the Aberrant Mind. Meanwhile people who, like me, want to play psionic characters have been since it was just the PHB.
And when we've already got a psionics book published it would be throwing out a significant part of the design philosophy of 5e to get an entire other one. It
wouldn't have been out of line with 2e, 3.0, 3.5, or 4e to get splat bloat reaching psionics. And it wasn't out of line with 1e to get ridiculous psionic attack and defence modes. But it is out of line with 5e's philosophy.
If Psionics is two separate systems that have nothing to do with one another (Spellcasting and Psionic Dice) then there's no thread that actually connects them. No mechanical construct that is "Psionics". And that's not any thing. It's two things kept a world apart.
So throw whichever one you don't like out and you have your psionic system. The problem is that you're asking for an imposed Grand Unified Theory. D&D IMO shouldn't worry that much about grand unified theories of psionics until it has the grand unified theory of the hit point - which is far more fundamental. Then we can follow it with a Grand Unified Magical Theory - and while doing so explain why some magic is spells and other +1 weapons.
The rules are IMO much better used as a user interface than a physics engine.
It just makes it a really basic and half-hearted attempt to appease "Serious laissez-faire DMs". Ain't that an oxymoron? Also... Harried Players? Special Snowflake Characters? Everyone's lives harder? Geeze. Lots of appeals to emotion.
Do you have anything beyond appeals to emotion and that you don't like the way the official rules work at your table? The psychic characters are already there. It's just that a few people don't like the way they are implemented.