Kind of odd that WJA would be moving back towards "hub" operations when "point to point" is the latest thing.
I'm thinking AC's new 321XLR's are changing the economics on the TATL routes - and WJA doesn't want to get into that gunfight with its current fleet model. Here's where AC can go with it's XLR's: 4,000nm ranges from Vancouver (YVR; yellow), Calgary (YYC; orange); Toronto (YYZ; red); and Montréal (YUL; blue). Image: GCMap.