main thing is: implementing a wedding system wich does nothing but "being married" is kinda meh and not fun - feels dull...does nothing....but implementing some fun and rewarding (of your choosing) weekly/monthly bonuses to it along with a fun system (if its unique quests dungeons whatever comes to mind) it adds more spice and more things to do in game....we dont know how much of an endgame we have but anything new and fun to pso2 is always welcomed
we already have the "choose what you like" with the mission pass where we can choose to get tri boosts + goodies or rather grab fashion we like and enjoy....adding this kind of thing to a wedding system would make sense too