Well I'm a 1v1 player, and I think 4v4 is for noobs, and relic shouldn't even try to balance it because I personally don't play it. LONG LIVE KT SPAM!!!
4v4 was balanced pretty damn well before WFA, the only problems in the mode were ISUs, Elephants, tigers and Opel trucks all of which were addressed on release day of WFA.
As for the comments of the OP i completley agree about the Elo system not functioning correctly, this is due to how unpopular it is for competent players to play allies at the moment. Though soviets are still strong enough to compete against a non mixed axis team, i still don't play them b/c i get teammates that build build 7 rifles or 10 cons and run them in 1 square space into enemy mgs...
Please balance 1v1 at least i could play that then even if 4v4 isn't working...