I'd say the idea would work better for a metal manufacturer like Hagen or Germania, but it'd make an interesting diorama.

But there is already such set in metal, produced by Germania Figuren:

http://germania-figuren.com/gx2/1-72-Resinfiguren/1-72-Germania-Figuren/Der-Erste-Weltkrieg/--8222-Sarajewo-28-Juni-1914--8220----das-Attentat---DEZEMBER-2015.html

Interesting idea though I think missing components of the French army(and others) would be my priority...

Personality sets have been a Strelets strong point in the past. a set of WWI general staff personalities might be right down their street. It is ,of course, a set that people will only buy one box of.

Obvious appeal for collectors and dioramists but, dare I say, wargamers could use these to designate areas that their opponents artillery can't possibly reach.