Since its BC-only, I'm guessing it has to do with leveraging the CBC's newest star, Tony Parsons, who has been the highest watched news anchor in the province for decades (first with BCTV, which later became part of Global). When Tony arrived at CHEK and then joined CBC News as part of a sharing deal between those broadcasters, Ian Hannomansing was moved over into a "regional reporter" role (also as main fill-in for Peter Mansbridge on The National) so CBC BC News has been on the upswing lately. My guess is that they are simply trying to make the most of that, strictly in BC.