Currently, all active feeds are updated each time the update is started.
However if I know a feed is updated only once per week, I could tell AntennaPod: “Do not update this feed for 7 days after the Published date of the latest episode.”. This number (an integer number of days) should be customizable per feed and a zero would mean that the feed should be updated every time.
This would significantly lower the number of feed accesses and maybe inspire authors of other podcast apps.
Another feature could be another (higher) number that would show a symbol in the feeds list, if a feed did not publish a new episode since that number of days.