sorry mate, i don't want to be rude.. but what if we remove france, england, hre, etc and add some villages in sahara, russian stepes and some weird frozen island in nothern atlantic. it would be very fun to conquer the world starting with a 50 population village in the middle of nowhere..
now just think about what u proposed. we have lithuania, polland, teutons, denmark, norway, novgorod, kiev with interests in that area, do u think it's wise to add 2 x 1 region nations ?
this game sadly only suports a small number of regions and nations, i also play from time to time another game, it's called Europa Universalis 3 ( heir to the throne is the last addon ). try it out, there are dozens of modes, i advice you to try MEIOU for Heir to the Throne. that mode has the best map and it's best ballanced in gameplay, events and map. i'm quite sure u will find it atractive if u get bored to play same nation, as the game engine can support up to 600 nations and several thousands provinces u will never get bored playing same nation. going back to medieval tw2, as the moders options are quite limited by the small number we must have some biger and more important nations.