He's an LMD. We also have to consider what origin they might use for Vision and starting off with an LMD might be a good way to establish some background.
It's disappointing that we don't see any really recognisable names in the concept. Arrow is enjoyable partly because it is teasing fans with known characters. I don't expect Hollywood actors to guest but I'd be happy if they were to cast other actors in some of the more recognisable roles. It might be nice if the characters develop their own gimmicks and minor super powers as part of the SHIELD Super Agents program. Bring on Demolition Dunphy I say! I was also a fan of the concept behind the Vamp - a minor telepath whose energy belt let her duplicate a psychic template of her opponent so that she could instinctively use their own skills against them. Loads of fun to be had there.