Alright, I've been pondering the specialist and the themes.

Specialist

The Infiltrator and Morphean specs for the Specialist are...really nonintuitive. If you want to use disguise stuff and fool people? No, that's not the charisma-based one. That's the wisdom one despite disguise and bluff being cha-based. If you want to use Sense Motive and Medicine? No, that's not the wisdom based one or the Int based one. That's the cha based one? Which rather hurts the Morphean (Which already seems a bit weaker than the others). As good social stats means you can't get the talents for social infiltration...

Themes

Test Subject Really, really fun looking. When you get advancement catalogue, can you retrain both your bonuses with the same hour work or are they an hour for each?

Conspirator By far my favourite of them thematically. Does doublespeak work for ALL methods of passing on secret messages? Like say, cryptography for a computer-sent message? That seems very relevant in a sci-fi game but they don't get anything with computers.

Sleepwalker This, I'll admit...I'm not really sold on. It feels a bit flavourless when it is just 'Be psionic' and there is already a lot of ways to do that. I feel like it needs stronger in-universe ties to...something. Sorta like how priest is tied to a religion so it's not all just about 'Being magical'. Dreaming Wide Awake requiring a power point feels a bit restricting, since the theme only give you a single power point and you are unlikely to take 'Look at me, I'm psionic' as your theme if you've already got a psionic class due to redundancy. The 1/day skill change however is fantastically powerful.

I think, if I wanted to play someone who's a fun psionic I'd likely look at Test Subject before Sleepwalker, as it gives a lot more in the way of in-universe plot hooks. Sleepwalker just feels sorta...there, without any in-universe ties to people or groups or anything but your own internal power.