So... do we have an earlier start date too for all those Ruthenian countries?
They didn't really form, so I think it's just optional releasable states, much like ukraine was. Doubt there will be any bookmarks of it.
And making it where the hordes don't need to reform to keep up late game would be TERRIBLE because 1. the ones that DO manage to westernize and reform become ungodly death machines with their inf/cal ratio and NI's.
2. It's stupid. I mean it's stupid. You realize this isn't set in Genghis Khan's time right? centuries late, innit? Try changing itup, go play CK2 and check out the mongol invasion bookmarks, play as them. Notice how they are actually not behind in warfare tech, how they have horse riding bows capable of devistation of the standardized lines of soldiers following roman example of 'left foot, right foot, left foot, right foot' lol.
Then fast forward 200 years later, where the soldiers saying "left foot right foot" have guns.
You know. Things that can murder another human wearing the best midieval european armor from meters away with little to no skill. Things that scare horses half to death when they are not used to it. It throws the horde advantages out the window almost completely.
You wanting to play Timurid The Great in the era where his people were declining and integrating into other lifestyles is fine. You demanding that become the standard.. Isn't fine. :|
MOD it if you MUST.