I would rather have the Russian maps 2 releases away than one, and here is why.
Some amount of gameplay tweaking needs to exist to maintain the current mode of play while making FH2 unique in the Eastern front. Otherwise, once you've played Vossenack, Totalize and the like, you've played the Eastern front.
AND I think we have just one major update to finally include any missing Normandy battles we think worth exploring, and more Bulge maps like Foy. After that, I imagine suggestions upon suggestions coming out for moar and moar Eastern Front maps and then Early war. It will be bad politics at that time to turn back.