I'm not fond of the Warren and Laura relationship, but I'm going to take a guess that they might still be to gather. Whenever Bunn or Taylor have answered a question about it they have given themselves some wiggle room to avoid total confirmation. It wouldn't be hard for either one of them to say they broke up off panel. It also wouldn't be hard to throw a few lines into one panel saying that they broke up. If they were broke up I think we would know by know. And I don't see the need for them to be so silent as to weather they are to gather or not unless it is planned as a plot point.
Of course now that I have said this one of them will likely confirm that they are broken up in an interview or in an upcoming story.