If there is time for small changes before the game finishes its trials can I suggest;

a) the rebel provinces of Westweal, West Devon and Devon should have 'Welsh' as their culture, not Anglo-Saxon. They should be Welsh rebels not Saxon rebels. This would quickly reflect the true cultural dynamics in the south-west with the Cornish Welsh.

b) where are the Mull of Kintyre and Anglesey? I know its not crucial but the map looks a little strange without them.

But otherwise - this mod is spectacular - perhaps the best complete overhaul mod yet.