this is the same response I gave someone else asking the same question a couple of pages back:
To start this post will probably be of no help
I don't do "is it worth it" because it's so dependent on each person
I did the GN party during SW Celebration. I am a local and an APholder so I was there just for the GN exclusive things and not any of the rides, other than RnRC with SW music
This year they have announced the talk with Imagineers about SWLand and that is something that to me is very interesting.
The motorcade at the start of GN during Celebration was not announced and they could do something like that, maybe not with celebrities but with characters?
The droid builders brought a lot of droids to the Animation Courtyard, not only R2D2 units but other astromechs so it was a fun photo op.
The Photo backdrops were really cool and they had them scattered around the park, the SW atmosphere with music pumping, fans in costumes or cosplaying was great.
The party is non refundable and non transferable.
With your party ticket you can enter DHS at 5pm