I Definitely like the idea of two different games for the two different sides in the story, but that is not the major factor for me buying this game the major factor is that its a Fire emblem game straight out almost every FE game as brought me delight while playing each and every one of them. I have played every single one expect for FE 1 and 3 and I cannot explain in words how excited I am about this game.
There will most likely be some major balance changes to some certain skills to prevent total steamrolling from happening. Won't be even surprised if they decide to drop Gale Force