Making maxim more offensive does play into soviet and binds better with cons. Likewise making grens stronger to take out the maxim will counter the spamming, with smaller cone and less suppression
This is where your logic fails badly.
More offensive maxim puts cons on the bench again, because cons just don't cut it without doctrinal weapons, while grens are the one singular unit in the whole game that HMGs, including maxim, are supposed to hardcounter.
You want Maxim to be LMG with setup and arc, its not going to work as evidenced by the state of maxim pre setup and arc adjustment patch and grens aren't supposed in any capacity to stand up to it frontally under any circumstances other then green cover they were at first.