This support needs to come back. I put seasons in best of lists for each year. I’m sure others have valid use cases for this functionality.
FYI, there is an open issue for this but no response on if, or when, it will be returning in the new UI…
I came to the forums searching for how to see if a season is already in a list (from the show page rather than having to check all of your lists individually) in the new UI when I found your post. I didn’t even realize you can no longer add individual seasons to lists in the new UI. This is incredibly frustrating. I’m VIP so I can still access V2 but even that doesn’t work properly and I frequently have to log out and back in to get back to V2. Plus, they’ve already said it’s going away for VIP as well.