Way too early to tell.
Around May 14, I bought a round trip YYC-YYZ-FRA (non-stop was unavailable at a reasonable fare). going on May 21, return on the 27th. Both legs looked wide open. Going, no problem, I had a confirmed upgrade etc. As to the return, from May 20 onward, it showed J0 C0. Still ended up getting the upgrade at check-in.