The problem is that, once you cart something out as a show pony, you end up as quite limited with what you can do with it. Marvel put forward the full court press with Northstar's wedding, alerted the media, released multiple variant covers, made it an 'event,' et cetera. They made it a symbol of inclusion and tolerance and all that, which is fine, but it's non-condusive to ongoing, organic storytelling. Northstar's now stuck as this symbol and it significantly truncates the possibilities of his ongoing development as a character. Basically, Liu should just have them go off and retire to the Canadian Rockies or somewhere, because anything other than an idealized characterization will end up looking like slander.