From what I've cathered, this wasn't a wwe decision but a USA network decision so they don't really have a choice in the matter.
Sadly this isn't the first time that USA as made a decision like that. The fact that raw is three hours every week and smackdown is live is also a USA decision that wwe were forced to do. It sad not only for the raw crew but also for the smackdown crew who does have christmas and the day after christmas off. While they will make more money from the live gate because they will sell out those shows. The ratings won't change because the show is live instead of tape like it always been.
Sadly this is a decision that wwe we're forced to take which is sad for the performer and crew but that's what happen when your a publicly traded company.