This topic has been popping up lately...
Many already stated that this idea wouldn't work because the writers will have to keep certain 'married' NPCs alive. The way I see it, if they wanna kill that character, go right ahead. If NPC dies, the player just gotta move on.
I personally wish that the idea could work because:
1) AYMERIC
2) It's comfortable to me (and maybe others) than marrying another player - yes, I have trust issues (and I wants the dress XDD)
3) IT CAN BE OPTIONAL! Players against the idea be like: "this is not a dating stimulator""I'm cheating on my EB partner""the idea is dumb/weird" - no one has a gun to your head saying that you have to do it.
All in all, I support the idea, but I'm not counting on this will actually happen. I kinda see why the dev team are hesitant because some players may get too attached to a certain NPC and if they die, all hell breaks loose and they don't have time for dat. lol