Dead Horse aside, I don't like the idea of unique national units anyway. A name and a priority for upgrades is enough; if you want elite units just throw them into the worst of the front. They'll learn fast 
My practical reason against it is that there was nothing necessarily better about these units across the board; sure, esprit de corps may have been better (but how does one model this in a computer game?), sure, perhaps the equipment was better and the unit better supplied (already modeled). But beyond this? These were men, just like you would find in any other division. At best (and I remain against this) you could argue for a bonus to experience due to "superior training".
Just my two cents.
My practical reason against it is that there was nothing necessarily better about these units across the board; sure, esprit de corps may have been better (but how does one model this in a computer game?), sure, perhaps the equipment was better and the unit better supplied (already modeled). But beyond this? These were men, just like you would find in any other division. At best (and I remain against this) you could argue for a bonus to experience due to "superior training".
Just my two cents.