As strange as this may sound... I think wargamers reallly dont know "what to do with WW I" as for gaming. After all I think most of our "first impressions" of military history we get from the youth of watching "war movies". (boy theres a great historical resource thank you Hollywood) I think that caught in the middle of the technological change is part of it. Tanks replacing the mass cavarly charges, trench warfare, and of course the 'Aero-plane', who no one really knew 'what to do with' at first.
Yet by 1918 the Allies had gained a pretty good idea if the final weeks and months of the war are any indicator... the French Army had reached a point where the infantry -fed up with being fed into a grinder to little purpose for nearly four straight years- would not advance without tank support, and the British had figured out that tanks were the game changers, so massing them whenever possible was considered ideal (and don't forget that the British had more than one type of tank -ie., the Whippet- and armored cars that the tanks literally dragged across bad going until the cars were brought behind the opposing lines, then turned loose like a pack of hunting dogs to seek out and destroy German rear echelon units including headquarters, troop concentrations, and supply columns).
1918 after the Allies broke through the German front lines were far more fluid encounters, just as the German Kaiserschlacht offers the wargamer plenty of scope for combined arms battles (ie., the British defensive practice of "Savage Rabbits").
Personally, I'm stuck on the idea of WF releasing a 1/56 scale Renault FT-17 given its ubiquity in both World Wars and many a conflict between, from the Rif War in Morocco to the Chinese Civil War, from the Spanish Civil War to the defense of occupied France and anti-partisan duty in the Balkans. All the kit would need for options are the barrels and gun mantle plates for the M1914 Hotchkiss machine gun, the 37mm 18SA cannon, and the Mle31 7.5mm Lebel machine gun for the "updated" variant used during the Second World War by the French and German armies.
I would also bet that the Warhamster 40,000 crowd would glom onto a reasonably priced hard plastic FT-17 kit for their Space Ork hordes, as would model and diorama builders.