I haven't checked the stats but I'd wager that there are a larger portion of players playing 4v4s than 1v1s. Granted a portion of those 4v4s might end prematurely due to a leaver but I'd argue that 4v4s is where the majority of the playerbase is and where coh2 is most fun.
I understand the argument that CoH2 should be all-around balanced instead of balanced around a subset of elite players solely playing 1v1. I resonate with that because I mainly play team games too but I enjoy the e-sports scene in my spare time. I think an interesting compromise can be made. In DoW2 there is a continuation balance mod made available called DoW2elite which balances the game around 1v1s.
Perhaps we can have the same here?
Have the balance team balance around team games (because thats where the majority of players are) then have a mod that is focused solely on 1v1s. Anyone wanting completely fair, 50/50 win rate, skillbased 1v1s can download a mod for that.
