Now can we imagine for a second if they did continue with this story line for the sake of a stupid reality show how the general fan base would take it...
They shouldn't. Both John and Nicole would put a lot at risk if they didn't solve their issues or just end the relationship for good and start again with other people. I can imagine the following happening if they fail to do either...
John and Nicole could become rhe laughing stock of both E and WWE. No one would go public, but they'd certainly make fun of him either in private or in interviews. They'd come up with barbs like Nicole can't see him, a double edged insult meaning Nicole is too stupid to see John for what he is and accept the fact that he isn't right for her, and no one can see John because he is so transparent as a person, there's nothing of value to see in him.
So, either they remain a stable couple, or they honestly split, because the middle road is going to be full of people who might stone them to death with words and they'll either end up road kill or wishing that they were.
I myself wouldn't be among the people that might do this. I would just turn away from them both, but not everyone would be so forgiving. Six years of being together and then going through needless hardships can cause people to react in ugly ways.