Great to hear it will be added on release! And I agree it should be added as an option instead of mandatory setting in the game. IMO with aging it would still be fun since decedent might not need to level up to operate a big country, as idiot son of an elite is still treated as "elite" lol.
Yes! Although I did not play warband that much(I play mods more), I felt in different kingdoms lords could have different troops composition thus joining different clans could have different kinds of fun