support for XMLTV tag <previously-shown>
Support for repeat detection/marking would be great by this standard mechanism.
Mainly how I suggest this be implemented is "new only"/"any" toggle in autorec. If desired, EPG displays would be enhanced by marking (R) repeats.
I guess there is some work done on duplicate detection that mentions repeats and tries to avoid the concept of repeats, but really this is about program selection, not duplicate detection, and dupe detection can never really be as fine grained because it requires a huge history. I'm guessing that this standard XMLtv tag is added to the standard later than dupe detection work in tvheadend.
I'm not very sure of the etiquette for submitting feature request issues so if I've gone about this incorrectly I apologize in advance.