I think this mod is incredible, considering you are just two guys you have taken leaps and bounds and at the moment there are no real competitiors. I do get some ctds and some weird happenings like the HRE dying out within a couple of turns but the interactive decision making is excellent, a real success in making it feel like ruling a kingdom. The idea of lesser factions is absolutely perfect and the titles system has totally raised the quality of the original game. My only gripes are not the technical stuff at all but I would like to see some advanced start pos, I think Russia's cathedrals of 1080 are missed as well as a greater variety of units and troop types, at the moment the constant sets of militia and peasants is and villages and mottes and baileys seems dull and too much hard work.
But it is a challenge and very good fun, made me feel like a king!