I'm so glad Illuminations will still be around this December. We've never seen the version with the holiday tag, so I'm excited to see it at least once and doing so via this party will be even better.
I hate to see Illuminations go. Our first experience with the show could not have been worse. It rained all day, and we were drenched. The walkways were holding a couple of inches of water. The air was thick with moisture holding the smoke from the show down, making it difficult to see anything very well. We left disheartened and unimpressed with Illuminations, knowing, but not yet admitting thanks to our temporary grumpy moods, that it really wasn't the show's fault - just the weather making for a miserable experience. After that first viewing, I would never have imagined that Illuminations would become one of my most favorite shows at WDW, but it has, and depending on my mood I might rank it first above all the shows, but it's at least always tied for my top spot.
The Frozen party is definitely my favorite, and I hope the end of Illuminations doesn't also signal the end of this party. Just in case it does, I plan to soak up all the joy of the experience when we attend the party in December.