“Worth it” is definitely subjective, dependent on several different factors
We did it on May 4. Because the park lets party guests in at 7:00 and because MDE recognizes the party ticket as entry, we were able to make FPs for the 7:00 and 8:00 hour.
May 4 is Star Wars day, so for better or worse (I like them, I know many don’t), we wanted to watch the Star Wars projections. This pushed back our time at the party. Weather delayed the projections further. If my memory hasn’t failed me, we started about 9:45.
After the 2 FP and the projections, we rode SDD with a 10 minute wait, then Saucers (walk on), then TSM 2X (both with fairly substantial waits, which was disappointing). We went back to SDD, but it had jumped to 25 minutes and we wanted to get more done.
So we did Star Tours, ToT (rider swap) and RnR all one time each (all 3 were mostly walk on). We ended at midnight because DS6 and DW were done, so we left 30 minutes on the table. We had plans to take a photo with Wicket, but wanted to prioritze the rides, so we never made it back to the Star Tours area. I honestly felt like there were a lot of people in the park (more than expected), but most seemed congregated in TSL. I never saw free popcorn.
I was disappointed in how little we got done, but I was expecting 3 + hours. Due to weather and an earlier-than-expected ending, we got in about 2 hours.
I probably wouldn’t do it again unless it was just me and DD11.