To counterpoint -
1) The building that CV is in is purposely built to have set changes, even more than one per day. It's a flex-venue, meaning they can host multiple things inside. I put no stock in the website, it makes sense to not list something during down seasons to avoid folks trying to book or wait, holding back their money from booking other things.
2) It could be that they are trying to sell both the Terrace and Plaza Dessert Parties, and there is no way the parade viewing area is big enough to handle all those that would book it. They never used to have the parade viewing, it was a new addition. Now that the Plaza garden viewing got added last October, it may change the structure ... and Disney makes more money.
3) No ADRS are available past 6 for most the TS restaurants in the park. There is a new plan in place for
MVMCP to possibly close park at 6 so maybe with the Halloween they are going to begin the wean by shifting ADR earlier. And who knows how well TS booked during parties, they may be making adjustments to availability of location and hours. I just think they are holding all that back while they play with numbers.
PS Club Villain is one of the best things we have ever done at Disney and probably one of the best values we ever got. Probably because specialty teams put that event together that are good at their job.