I do see more Ostheer and Soviets in team games, but I still see 1-2 OKW and USF players as well, they are just never the majority. I don't the USF is a dead faction right now, I do think it could use some help, but I don't think it is as bad as some people would claim. OKW is pretty good in 2v2, but starts to fall off in 3v3 and 4v4, where large arty wars and fast early game really punishes them. You can really only get 2-3 Shreks early with Volks and they will get shredded by 2-3 T70s/M5s, and good luck holding back that Maxim spam... King Tiger spam really isn't viable, due to rushing 1-2 of them really puts your team in a bind early and mid game as you sit on your resources adn try to stem the tide with just Volks.
I am not sure how UKF will impact the meta, but I do think Relic will give both USF and OKW something to give them some better options throughout the game.
OKW has the highest win rate in 3s and 4s . . .