I personally disagree. Civ5 WC certainly wasn't perfect, but it did add a sense of rebooting the game mid-game and some much needed late game activity. The new city state system has already come a long way to secure that you can't just outright buy voting majority by buying up all city states. There will need to be put some thought into exactly what the WC should do, and how a possible diplomatic victory should work, but I still would like this feature to return.
I have to agree, however, that the fact that the 2nd anniversary passed in complete silence does make me somewhat worried. There's been a conspicuous lack of communication after RnF release, but I felt fairly confident that they would come out of the bush at this point to somehow mark that the game is still alive.