@com - I was also disappointed and surprised by the absence of F for so many months. Our ticket was downgraded as a result.
We were looking forward to another trip to the CCR, the inflight service and the great new F lounge and pre-flight dining at YYZ on the return. I guess the lounge will be open, but probably not have the restaurant service.
I do not mind the 767s as we have flown J on then before, but it is a shame that they are not NGCW.
Obviously F loads at this time of year are low, but rarely have I found the F cabin that quiet, even in the winter.