Sanctuary is one of my favorites of season 9. There's not a whole lot of humor (aside from the idea of SpongeBob turning into a cat lady, which is hilarious), but I enjoyed the plot and the lack of bad/cringy moments.
I'm going to list all of the post-sequel episodes I consider below good:
Meh: Mutiny on the Krusty, Sportz?, The Clam Whisperer, Sanitation Insanity, Bunny Hunt, Cuddle E. Hugs
Bad: Tutor Sauce, SpongeBob LongPants, Married to Money, Snail Mail, Feral Friends, Spin the Bottle, There's a Sponge in My Soup
SCUMBOB: Lost in Bikini Bottom, Squid Plus One, The Executive Treatment, Two Thumbs Down, Lame and Fortune, Mermaid Pants, House Worming, Cave Dwelling Sponge, Chatterbox Gary, Old Man Patrick, High Sea Diving
Everything else is good or better (Lol I have so many post-sequel unpopular opinions)
I think we could start a new thread called "Least favorite post-sequel episodes." It would be similar to my thread called "Least favorite pre-movie episodes," but because it's the current era it might be more aktive.
2015 episodes are split down the middle imo. Episodes like Patrick! The Game and Sanctuary are amazing, episodes like Yeti Krabs and Sewers are meh, and episodes like the loser or Squid Plus One are scumbob.