Brief loophole available: PE domestic bookings now eUp at the Nov 8 rate, so for any travel in the next (your eUp window) days, you can book a PE award and upgrade instantly, which means I've booked YOW-YVR round trip J for 40k points and 8 eUps.
Interestingly, it doesn't want to charge me extra eUps for the YOW-YYZ leg, but does insist on the $75 co-pay as if that leg were still booked in X, while the whole award would be PE-eligible if the flight had that cabin.