Did you read the thing I wrote about the ratings earlier in this thread? I can help but I'd need to know what exactly you have problems with.

I like the backstory on the whole. My main question is "why Cerberus?" I was under impression they largely kept a low profile at this time, though I suppose one of their operations may have ran afoul of the turians. Would he even know what that group was?

The abilities all seem to check out well enough! It's possible to diversify them a bit to replace some of the skills with equipment, contacts or personality traits, but it works this way too. I'm curious about the Biotics flaw, though - it's interesting, but do you have some explanation in mind for why he would be so susceptible? Some kind of physiological quirk? A birth defect affecting his brain, perhaps? An allergy? :P