I'll check the skills thing, maybe add a few more class skills. If I dropped the SP and upped the BAB, how do you think this class compares to Morphling?
The armblade and armbolt are indeed natural attacks, but you get more of them based on your Evolution 0 ability (just like the other nat attacks from evolution 0). That is, of course, unless you use the armlaser or armgrenade. 
I'd be cool with more Class Skills
Having 22+ blah skill points per level just means that you're at a +50 or so to all skill rolls, and unless you take a feat that says "Add your Int Mod to all attack or damage rolls" then there's limited usefulness in combat. Though mind you, you could easily bluff an opponent into falling onto his sword, or persuade oxygen to avoid your foes... Or give a cross class lute performance so spectacular that it makes Baby Odin cry.
I'm kinda curious about the mechanosynth features. Specifically, at 2nd level a mechanosynth becomes immune to sleep effects. At 8th level, they gain the living construct subtype, and thus several immunities including sleep effects. I'm guessing you just wanted to push the sleep immunity up further?
It may just be the difference between "You are immune to sleep effects, but you still need to sleep" vs. "You are immune to sleep effects, and you do not sleep"
It is supposed to represent progression, to show that you are becoming more mechanical over time. Biosynth has the same, Darkvision is granted by the Aberration type anyway.
Yeah. Percival, would that mean an extension of Darkvision, say from 60 to 90 or so?
