So far, the biggest thing I don't get is this: The main character has a cyberbrain, supposedly. Also, androids exist.
Yet he's whining about his useless old body.
What? He apparently must have plenty of cash, so what's keeping him from adding two and two together and getting a new body? Hell, what kept them from not doing that during the sustained coma ravaging his musculature? The "oh god I'm old I can't do anything now" stuff wreaks of forced drama to me.