Takeaways:
The Board Game looks like an awful lot of fun. And tbh it's at a respectable price on the kickstarter!
Holy Fury: we've already seen the new and much-needed Crusade mechanics, which I'm very excited for.
The other mechanics? Most are things added in various mods (shattered world, random world, bloodlines, saints, coronations, baptism, etc), but other stuff is new and cool. New diplomatic options? Pagan warrior lodges? New pagan succession? List of Kills? Very exciting stuff.
Edit: looking at screenshots.
You can now customize pagan religions when you reform them! This is HUUUUGE!
Also the "random world" isn't new landmasses, but just a randomized history and randomized titles and characters.