I'd say this is actually a bigger problem than you seem to think it is.
I had a discussion recently about how to shut down a wizard. Take away their material components (or focus) gag and bind them, and they are essentially helpless they can't cast. This is true of pretty much every caster, with a few exceptions here or there for specific abilities (wildshape, channel dvinity, ect)
With no VMS for your Psion... they don't care about any of that. Ignoring anti-magic, ignoring silence spells, ignoring magical resistance.
If you made an Int based Psion with spells from the wizard spell list and spell points, but who was not limited by components and was specifically not using magic... then you have made a better wizard. You have taken the wizard and removed all their weaknesses and given them nothing to significantly balance that back down.
I don't want that. Psionics has to have similiar limits to magic, or it becomes just better magic.
It
really isn't a big problem. Make it so that if they don't have their focus on their person, they need V&S components again.
Boom problem solved next.
Also as you allude to, literally your entire complaint applies worse to Wildshape. Druids can't be restrained in any conventional way. You need magic anti-shapeshifting handcuffs or whatever.
Re: "A better Wizard". Obviously not. You make them less powerful than a full caster. You don't just go "Oh I'll give a Wizard spellpoints lolz!!!!". You give them a smaller spell list, make it harder to acquire spells (disciplines etc.), and make them never get a lot of the most powerful or flashy Wizard spells, maybe never get the equivalent of 8th/9th level spells (or only in a very limited way, like Warlocks). They should also get healing spells, which sounds like a benefit but totally isn't, because it means the character inevitably ends up dumping spell slots/levels into other PCs to help them out, rather than using those spells to blow people up or whatever.
Boom "problem" solved next.
Ignoring anti-magic and magic resistance? No, they don't. Neither me nor Remathilis suggested they should and even Maxperson agrees it's not necessary, and he has the most extreme views I've ever seen on this. This is a problem you have created by yourself.
Boom problem solved next.
I literally solved all your "problems" here in single-digit minutes.
I find that a strange use of the word "trust". I could understand, for example, "I'm not sure I expect them to do a Half-Giant at all..." But why "trust"? Did they promise they would do a half-giant?
?????
This is a really conventional usage of "trust" that I see used every day, dude. I don't think the issue is with me.
But for clarity, I mean, I don't trust them to do a Half-Giant race that is any way actually like the Half-Giant race from Athas. They've already messed it up once, in 4E.
And Athas without Half-Giants, Muls, and Thri-Kreen, ain't Athas. What next, Eberron minus Warforged and Changelings?