1/3
3 Years of Service
Religion at least needs mechanics for christianity. Like the papacy and the cardinals.I doubt Naval would ever happen in CK3 since that would be a core mechanic that would change the entire game.
CK3 religion and culture is pretty good but lacking in some areas. For trade yeah I doubt it will become a bigger thing.
Maybe EU5 or if they somehow get Victoria 3 to actually be appealing since I fucking hate the combat mechanic in Victoria 3