I really like the direction you are going with this by including updated versions of some of the best specific mods out there (eg recent orders update stuff).
Currently playing as France, which is a bit more satisfying than England was (because no longbows or billmen for England was too similar to generic faction for me... I know you already said you'd address this later).
I think from a gameplay perspective, as you have taken the step of putting a starting general or family member in every province, starting LOYALTY (if not command and piety) should be placed at 3 across the board as a temporary stopgap measure for nonfamily until you redo them in depth.
Also (dunno because I have not had a chance to see it) but can order units be free upkeep units? Seems to me that if you have an order chapter house you should be able to have, say, 2 free upkeep order units garrisoned there. A major chapterhouse 3, etc...
Just a couple ideas.