Here is why I think no one is even really playing these, no one has asked for a VASLization of any of the maps nor counters yet, true they might be playing them face to face but if they were really that great then people (at least a small minority) would be saying how much fun they were (you can take for example mine and Scott's praise of Critical Hits Africa Korps packs, an we even have a VASL map and overlays for it now).
Again, I love ASL but I think that its system is good for 1920ish to 1960ish combat mainly for the Poland-Russian War, Sino-Japanse War, Russo-Japanese War, Spanish Civil War, WW2, Korea and some parts of the Middle East wars from 1948-56 maybe even some of the India-Pakistan war in 61 (IIRC). In my mind WW1 was just fought and thought of (other then 1914) in completely different terms, and any combat pre 1914 have other systems that are or have been create for them, same with 1950-90s combat. My reasoning are base a little on technology and a lot on how the tactics changed either before 1920 or after 1960.
Another source to back up my thoughts is the Shrapnel computer war games called Steel Panthers: World War Two (1920-1950) and Steel Panthers: Main Battle Tank (1950-2030). In the WW1 the main unit of maneuver was the company in WW2 days it was the squads after Korea in Vietnam and till present day its the Fire Team.
Anyway, I just have not seen a large playing or praising of these creations so that is why I think they are just for collectors and not players. Hey we be playerz.