Cons are a close range unit. Cover doesn't apply in extremely close ranges anymore. There's also rng in this game so I could tell you the same story with Volks getting beaten by cons. Volks also cost 10 mp more.
The game is very balanced atm and any change runs a real risk to upset this.
You're horribly, horribly wrong. I suggest you load up the testing mod that lets you spawn units and test them. Maybe then you will realize that conscripts have almost literally no chance to beat volks. The only scenario where they can win, is if the first shot is fired at point blank range. This means that they have to somehow surprise the volk squad from behind a corner.
10 more manpower is collected in less than two seconds and saying that it justifies the efficiency gap is just hilariously stupid.
Sure, cons can win in the situation I described, but how often does that happen? Maybe once every few games.