4v4 as Soviets is tough now. If you think you need MGs the maxim/conscripts combo is so meh that I always pray for a Brit team mate. And if your micro is not super good you need to go MGs because snipers or scout car can be hard to manage and its an all or nothing solution. Not to mention that you may need to go MGs so you can have AT gun support.
Personally I could see the maxim with just a touch more suppression. When maxim was king I easily had a good rank with SOV. Now its one of my worst ranks. Feels slow to setup, doesnt suppress, and goes into a death loop. So many times units just walk right thru the arc and are not suppressed. If the change from old to new is 100%, maybe add back 10% of the lost suppression???
That's why I always have the verterancy 10% increase bulletins on MG for 4 v 4 games.