A robotic enemy would probably have its own security systems to prevent it from getting hacked, at least easily. I highly doubt anyone who creates automatons would allow such a thing, and would definitely place security programs to keep their inventions from being used in the wrong hands. As for cybernetic parts... well, people are going to have weaknesses somewhere. I'd say it really depends to the extent that the person who has the cybernetic parts can control them, so maybe Press has limited control, like enough to hinder their movements. As for his hacking, let's say it's pretty weak at the moment and he can only enhance other hacking programs. That way, Press can't just go to any old computer and suck all the info out of it using his mind alone. Also, keep in mind that his armor is still in beta, so it still has bugs to work out. And Horus and Press have a history together, so I'd doubt they'd be separating anytime soon. After all, life as an inventor can be lonely, and he'll need some form of companionship. As for surveillence, well, he is paranoid, and so its his backup plan.

As for your new character, do what you want. It's your idea (maybe inspired by mine, but yours all the same), so yeah.