This is an extremely simple to implement feature request given that the infrastructure already exists, so I hope it’ll be considered even if it’s not popularly demanded.
I would like to have the option to filter by “Season rating” in the advanced filter options. This already exists for both shows and episodes, so I’m not sure why seasons were left out. While we’re at it, might as well also include the other fields like “Season title”, “Season year”, “Season last watched”, etc.