Thanks for the suggestion. This isn't currently on our roadmap but I do see the value in allowing this if a checklist was discarded by mistake. We'll open this up for voting to gather interest from other clients.
I am taking the Promapp training, and we created some checklists for training purposes... big mistake. Now we have a debris field of dead checklists that cannot be deleted since they are discarded. I understand changing the status as suggested here potentially would allow me to delete these dead checklists?