How much were the airport/fight taxes to go/going with the fare in points you paid?
If the taxes were $300 or so, ie, international award, then I would probably 99% go and cancel the flight, that $300 would/could be very useful.
If say, $200, I might still phone up and cancel, under that, I would let it slide.
OT, JQ cancelled a flight on me, for which I had booked a Y seat, couldn't do OLCI the night before, I didn't realise that they were already cancelling the flight, got to airport, 4 hours before flight, MEL - ADL, nope, still couldn't check in, via kiosk or mobile device, still wasn't told specifically flight was cancelled.
Went to QFd MEL QP Lounge, told to wait till later to check in, was in lounge, then lucky I sort of heard the mobile phone go off, yep, my JQ flight got cancelled.
Rushed down to QF to book a flexY MEL - ADL, couldn't wait till the next day, JQ had offered a $150 hotel voucher, but where can you get a hotel booked there and then, for that price, even Ibis budget wouldn't have that cheap, for there and then booking.
I think the JQ fare was $149 or so, to sum up, I had now paid double taxes, the JQ flight and the QF flight, had to work next day, early.
JQ flight taxes was probably I would guesstimate, $29 or so, piffly.
In the end, up to you, OP.