what I have so far noticed for post-5/16 WAS<-->SEA/LAX travel is that W (C+) is running approx $120-140 over whatever coach fare is available on a particular flight, pretty much routing-independent except for JFK ... this is actually reasonably consistent with what non-elites currently pay for the two C+ segments
FCM still seems to be starting near what I've paid for the past year or so ($380-$440); there are also a lot of options in the $580-650 range, but on some trips over ATL and JFK it runs as high as $1400