I was under the impression that the Mongol units have not been included because the Mod was never finished??
As far as I am aware they still have yet to be completed so I would question the worth of adding 'MI', afterall it only introduced Japanese fantasy units besides.
Unless the Mongol units are finished and added I honestly don't see the point, considering the popularity of Mods with the community and, of course, when the majority are playing RTW now anyway. Sad but true

.....Orda