YVR makes sense when you consider that the pax and crew would have to clear Canada Customs and Immigration upon arrival and YVR is set up to clear a plane load of international travellers. Therefore Moose Jaw would be off the wall to begin with. Flying the extra distance to YVR would burn off fuel so the landing weight would be reduced. it's a judgement call and a lot of factors go into the final decision.
Then again , I can't fault the crew , for wanting to stay away from Londonstan for an extra day or two.