Too bad you had to abandon making Novgorod. Veche was much more important and influental there than in Kiev. Also, -2 recruitment seems... harsh. How many units per turn will Kiev be able to recruit in a province, 1? I do understand that we were weak at the time and were completely owned by the Mongols, but it seems imbalanced. Still, the lack of unity is considered the biggest trouble of Kievan Rus'. IMO, I'd do something like your Palace Intrigue for Kiev. However, it still doesn't fit very well as the struggle was mainly between relatives. Or, maybe, more unrest in the whole faction from the number of generals present, if that script is possible to make?