Yeah but the Aberrant Mind Sorcerer is still a Sorcerer.Or, alternatively, we can give the psion unmatched ability with the spells that overlap with what we'd expect a psion to do. We could for example do this by making sure that psions had no verbal, somatic, or material components for their psionic abilities, just needing to think and exert themselves for the magic to work and making them better at these spells than any wizard. This would have the effect of not restricting the wizard but meaning that the wizard needed gestures and incantations to imitate what the psion could do naturally.
We could then give them the ability to tweak their psychic powers that no wizard could match. And then we could give the the flexibility to reallocate their spell slots for these powers, changing two first level spells into a second level spell or vise-versa and effectively making them a power point class.
All of which makes the psion simply better with psionics than the wizard is even if the wizard has spells that can imitate the psion.
The thing about this is that literally everything I have just suggested is what the Aberrant Mind sorcerer already does.
Psionics are in 5e and there is no need to add them again (except "Psionic Gifts" for Dark Sun alongside "supernatural gifts" and "dark gifts"). The Sorcerer is a psion. And better implemented than in most editions; it's a power point using class that is actually better at psionics than the wizard. The soulknife rogue blows the 3.5 soulknife out of the water (not that that's hard) while feeling like a stealthy psionic spy/assassin. The Psi Warrior is a Psychic Warrior and, like the Soulknife, they do it in a way that feels different from any spell slot caster (unlike the 3.5 Psychic Warrior who was Yet Another Gish).
5e has simply the best psychic rules of any edition of D&D - it doesn't have wonky classes or try to bury you in a whole pile of not!spells that are used to justify the existence of these classes, but does have almost all the actual psionic archetypes covered. And from what I can tell, remembering the old rules, the 5e psionics rules have been a spectacular success - and are both far less complained about and far less often banned than the psionics rules in any other edition.
And the 5e Sorcerer base class is a terribly designed class that the designers botched due either apathy or fan pressure.