This is a really excellent mod, it makes the game infinitely more enjoyable than vanilla. With that said, I'll move onto some things that I've noticed.
For some reason, in most of the intrigue pop-ups about people plotting, the word "ENGLISH" is added to the back end of the names of the people involved. It'll say something along the lines of 'Droungarios SoandsoENGLISH is plotting to do a bad thing."
Also, there are some strange cases of duchies having de jure cities, baronies or churches that lie outside of their actual territory. One of the southern Hungarian duchies has this over one such holding in northern de jure Serbia, and I think the Duchy of Alania has one for a temple in Georgia. It's relatively easy to tell because when you click the title to get the de jure territory outlined with the de jure mapmode off, you'll see that the de jure territory boundary sneaks off into some other duchy or kingdom where it really shouldn't go.
Additionally, is there any reason that the AI doesn't immediately force it's target to surrender when it's not using an invasion casus belli or something? Sarkel has been attempting to conquer the poor little Khazar guy at 100% warscore for a number of months in my most recent game, and for some reason it just didn't want to have peace declared. I've seen the Kingdom of Sicily do the same when conquering the muslim-held areas of Sicily, but that was in an earlier version. Incidentally, why isn't the Khazar Khaganate formable?