Heyo I'd like to suggest a change about the Couple Rings (i.e Marriage) As most people know, it's a ring that gives some defense, and has some slots. But we don't have any scroll that works on rings, so it's almost useless. And we have limited Ring slots, so if you're playing for more than a year, you'd be able to gather enough rings to use up all slots: 2 Carat Ring - Valantine's Event Zombie Army Ring - Halloween Event Pumpkin Ring - Thanksgiving Event Almight Ring - Krexel Soon we might have Dojo's ring and hopefully Explorer's rings. So, my suggestion is to see if it would be possible to make Couple Rings NX-like, so we wouldn't miss the effects when we are nearby our couples.
Wearing a stat-less ring shows how much you love your partner: you are willing to sacrifice stats for the love
Ah, so ring scrolls don't exist. I was wondering about that: what if you scrolled it and it went boom? Try explaining that to your significant other: "Honey, I blew up my wedding-ring!".
On top of the difficulty required to make the wedding rings work as cash items rather than regular items, it would also cause friendship rings effects not to be able to stack with the wedding ring effect. I do also like @PhotonSphere's answer.