Not sure what other lounges you want to access at YVR. The CX lounge is open only for CX flight times, so there may be no overlap with when you are at the airport. I remember the YVR lounges as being rather dismal, adequate but nothing special and with poor food selections. Much nicer lounges at the LHR end.

Edit to add that actually I think BA uses the CX lounge in YVR, so there isn't another OW lounge to go to, but I'm not sure about this as I wasn't paying close attention, however it was not a BA Terraces lounge.