Keep X hours/minutes of unplayed episodes per podcast
For podcasts with long episodes (50-60 minutes), I only need to keep a few episodes on my phone, but for podcasts with shorter episodes (10-20 minutes) I would like more espisodes, so:
Be able to set an amount of time for each podcast (universal or different amount for different podcasts)
Then PA keeps either keeps the most recent X hours and deletes older ones (if user always wants, say, the latest news) OR PA waits to download new episodes until the total downloaded time drops below limit.
For example, if I am listening to a serialized podcast where you want to listen in chronological order, I am unlikely to want to download the latest episode if I still have 8 hours of old episodes to listen too.