If enemy SF:1 mecha use team AI, they could use the divide and conquer tactic to aim at the same target mecha, at the same critical location. That wouldn't make things too hard, would it?
I like the idea of SF:1 mecha being able to traverse personal scale maps. Well, not all of them (it'd be too much to ask to make them fit through doorways), but right now they're either ants on an SF:2 combat scene, or not used at all.
SF:1 are cheaper and smaller than larger ones. I can see practical uses for them in packing, cargo loading, personal scale security and law enforcement, scouting, or even as common transportation (SF:2 mecha are like giant trucks and tanks, these would be more like cars).