UMK3 Cyber Smoke =/= MK9 Human Smoke. They are way too different as far as playstyle goes. It wouldn't seem right to have the move set that MK9 smoke has with a cyborg uniform. I say they make Cyborg Smoke as DLC and make him like he was back in the day, with some minor changes.
I agree with you 100%. NRS also doesn't have to make him canon if they don't want to, he could just be treated as a guest character.