A feature I always wished was in the plex app is a way to actually delete a show from the server. I end up having to go log into the server and manually delete shows that I no longer want (basically everything after I watch it)
I have read the pms api supports this, but I don't know if that's true.
Some other clients do have this feature, if enabled in the (advanced?) PMS prefs.
PlexConnect does not currently have this ability but I will add it to the list of ‘to be discussed’, just bear in mind any implementation might not have the highest priority relative to some other features.