we see the merits of your suggestion, but at the moment we're working on late war Serbs. You're right, that they, ideally, should look like French, but we will retain some unique national features (like we did with WWII Indians, etc.), and, if mixed with the French from other manufacturers, could represent this specific army.
We shall see how this set will sell and, depending on that, will decide about further sets.
In the meantime we're working on another WWI unique subject, not covered yet at all. Follow the website for updates.