How about “The Haunting of Whipstaff” for S3?

Probably way too clever of an idea, but they should try a gritty take on the 1995 film Casper for a third season. I loved it back in the day in the theater when I was 9 years old, and watching it with my kids in recent years, it’s actually still pretty fun, and is positively ripe for adaptation into something more serious.

I actually originally thought it would make a great limited series a few years before Netflix made their “Hill House” series, and that it could simply be called “Whipstaff”. But with Bly Manor being used to continue the “The Haunting” title with an anthology angle, I vote for season three to be “The Haunting of Whipstaff”.