"Love" should not be involved in this content...

Take the wedding vanity gear, make them a recipe reward for completing a quest involving two NPCs getting married (fairly sure we had a side quest leading into that already, which called it marriage by the way).

Take player marriage, change it to a Battle Brother/Sister Oath.

All the rewards player marriage was going to have (I believe we could teleport to each other?) instead go to players who take that oath. It has no romantic undertones like marriage does, meaning nobody can take issue with two dudes taking it, and more people can actual involve in the content. How many people are actually going to get married in XIV? Anyone who isn't wont be getting any content from this as it stands. A platonic oath on the other hand, that's open to everyone, except for Jimmy-No-Mates. Anyone who wants the oath to have romantic meaning can give it romantic meaning themselves.