Might there be scope for producing a version that merely fixes more general things, e.g. culture and religion, rather than caring too much about precise individual characters (after all, historical characters are cool and everything, but it's not like you really care after the first few decades of playing).
Things like:
- culture of Iberia shouldn't really be Visigothic, as that was ~1% of the population
- there should still be some Greeks on the coast of Dalmatia
- Vlach should be Latin culture group
Anyway, keep up the good work, etc. HIP is amazing, and SWMH is the best part of it!