Christmas time was interesting for
Genie+ as each park not only added those ILL$ to Genie+, but most parks also brought in one additional item that had a Genie+ pass available, which was kind of unique.
Magic Kingdom had the Christmas parade. With the Festival of Fantasy Parade returning, that pass may be available again.
Animal Kingdom had the Kali River Rapids ride reopen. That was closed for refurbishment since early November, so wasn't available during the Thanksgiving crush.
Hollywood Studios had the return of Indiana Jones Stunt Spectacular.
Epcot I don't think had anything additional.
In my opinion, having extra rides definitely helped as there's more rides for people to spread out to. More availability is always a good thing. Plus you spend less money on ILL$ if you're wanting to ride the rides they moved down. We did 2 of those and 3 of the 4 remaining ILL$.
Yes, you still see things sell out throughout the day, but could still find something available later if you wanted a line to skip