Oh my, it's been 5 months since I last "worked" ony my RCW variant...
Basically, my idea was to make it more of a role-playing variant, where you play for the commanders instead of whole groups in the conflict. The Eastern front (Gajda, Semyonov, von Ungarn-Sternberg, Zhang, Mitsue) would be more loaded with each starting with 2 units. Once this part of the map is decided, they can either try to trek West for years (Siberia and Middle Asia having sooo many empty provinces) or take the quick way via Trans-Siberian railway. That mechanic was not yet decided though it would use the war train (very prominent part of the war, also - trains!) unit which should be able to convoy armies along it. The trains themselves would move like crazy but only among the railway.
Anyway, in the West, each character (Pasha, Denikin, Wrangel, Makhno, Pilsudski, Bischoff, von der Goltz, Ironside, Trotsky, Tukhachevsky, Vacietis, Stalin, Budonnyj, Kappel, Dutov, Kolchak, Syrovy) would only have one unit, making it pretty much like Chaos although the home SCs wouldn't be adjacent. Syrovy would actually have two since he's the doorkeeper to the railway in the West and so he shouldn't be steamrolled from the East until they duke it out there.
I think the modular build could be interesting and in the pinch, the numbers could be balanced so that players could play it like team game - Reds vs Whites vs Nonalligned (Poland, Japan, Freikorps, Turkey, Czechoslovak legion, Entente, Alash Orda, Black Army) although the Reds would then benefit from not playing in the East and having better defensive shape. Then again Reds vs Whites plus the rest joining who they want? Much replayability.
Anyway, some WIP pics, let me know if it makes some sense or even pick it up if you can commit more than myself.
http://img267.imageshack.us/img267/2253/rcw1.jpg
http://img41.imageshack.us/img41/7863/rcw2.jpg