But they get even more sight than pios at vet 1. And pios are hardly capable fighting units. Avoiding mgs and being able to fight at long range reduces bleed which offsets high reinforcement. I don't think I'd change any raw stats but the extra sight at vet 1 should be moved to vet 2, or grant a larger sight boost at vet 3.
Then build something other than mgs. Mgs and mortar spam should not be able to beat everything usf has.