What machine guns like the Deceptor should be good at:
• Suppressing enemies at range
• Engaging groups of enemies at range
• Taking out large dangerous targets from a safe distance
What machine guns in PP version 1.7 are actually good at:
• Shooting enemies from 5 feet away
• Beating enemies to death with as a club
Suggested fix: Increase the effective range of the Deceptor/Uragan to 30-35 or so, but make them cost 4 APs to fire or Overwatch with. This would mean you'd have to set up Heavies on one turn before firing them on the next. I'm still not sure this would make them better than the Synedrion assault rifle (which does 30x6 damage reliably at a range of 37), but it'd at least give them a niche.