Currently, you can hide a show from you calendar or progress page. Hiding from watched progress also hides it from your dashboard on deck. Hiding in those 2 places should work for most users.
This topic proposes a “dropped” status for a show. This would hide from the 3 sections mentioned above + add a “dropped” indicator in places such as the show summary page.
An error occurred while saving the commentZapata commented
I also think this is a great idea. It would help clean up my "progress" in exodus kodi. I have more than a few duds I'd like to get rid of.