If you want feedback, I've two suggestions for bloodlines which strangely enough were not in the game.
1. Rhodri Mawr or Cunedda for the House of Aberffraw: I like how you included bloodlines for Vortigern and Caradog's descendants, but I find it really odd that you didn't have a direct one for, arguably, the most prominent Welsh dynasty, that of the House of Aberffraw. I mean there's two really important characters that you can choose from, Rhodri Mawr and Cunedda.
2. Cnut/Knud the Great for the House of Estrid: I know that the House of Estrid technically have the Ragnar Lodbrok bloodline, but the dynasty was famous for its strengthening of Christianity in Scandinavia, its relationship with the church (see Archbishop Absalon and his relationship with the kings), and its initial claims on the Kingdom of England through their dynastic relationship to the founder of the North Sea Empire, so I feel that'd be more appropriate.
Otherwise, great content!