Try to make sure you have reliable win conditions (Test of Endurance, Heliod, Sun-Crowned + Walking Ballista), so you can end the game before people get bored
Explorers of the Hero's Ruin in Best Wishes goes much further by including the "boulder rolling down a hall" bit and Cedric Juniper keeping a log of the ruin that is similar to the Grail Diary in Indiana Jones and the Last Crusade
For Collectors The Definitive Sword & Shield Experience This set is the crown jewel of the Sword & Shield era
What should or should not be sacrificed
The cap is around 70/month, which only large sellers with massive inventory (like me) ever hit
Between main sets, Secret Lair collaborations, bonus Lord of the Rings: Tales of Middle-earth content, and now a new Alchemy set, I dont know which to focus on