Umm, I've been playing with 2 friends of mine, with a mix of every faction, and this has been killing us. I really notice it, since I go heavy infantry with the USA, rarely tanks, and being able to only have 3 of either paras or rangers is seriously screwing up the mix on larger 3v3 and 4v4 maps.
However, since this is unintentional, I really hope it gets fixed soon. Being able to have a true even pick between the USA, British, and Soviets is really nice. I love the Soviet's inaccurate as hell overshooting artillery and the massive infantry waves, but not at the expense of any other factions.