Can I ask what success people have had clearing redemption Business (U class) for HKG-YVR? My wife and I are doing a HKG-YVR-HKG RT with the below flights:

Thu, 11/23: CX838, 1620-1145, X (Econ) confirmed, U (Biz) and T (PEY) waitlisted
Mon, 11/27: CX889, 0110-0700, U confirmed, X and T waitlisted

Any prior experience as to chances of this clearing last-minute (and when), or help checking on loads to get a sense would be very much appreciated.

On a slightly OT note, is 1.5 hours sufficient for transfer at YVR if we are going into US? We are connecting to an AA flight to DFW