I'm happy to share any advice or tips for anyone attending Celebration though the biggest tip I can say is we've both hit the jackpot in securing a Jedi Master pass as that should greatly reduce the amount of time we have to spend in lines!! Only at London was I able to get into the main stage for the biggest panel of Celebration (which then was Rogue One) so just knowing I'll be able to get into any panel on the Celebration Stage in Anaheim and not have to rely on the luck of the lotteries is massive!
I'm also looking forward to getting to go to Galaxy's Edge at
Disneyland whilst there. I'll get to experience the Hollywood Studios version first for my late December/early January trip to WDW but it will be great to get to go to the Disneyland version too.
I'd be surprised if they don't end up selling a hard ticket event for Galaxy's Edge whilst the Convention is on similar to the Galactic Nights hard ticket event at WDW they did for the last Orlando Celebration.