I agree that the "horde" feature should be used for the Magyars at the beginning of the game, but as it stands, this cannot be modded in. For the sake of simplicity, the Magyars should have those two provinces and stay allied to the Khazars. However, I think that once the team gets BI and can have the Magyars begin play as a horde, they should still be allied to the Khazars.