Add "Custom Settings->Episode Filter" exclude by days since publication date
Goal is to exclude (not download or add to playlist) any "old" time-sensitive episodes for specific podcasts which are become less relevant as time passes such as the daily news.
Ideally one could specify the number of days since publication so that, e.g., podcasts published in the last 30 days would be excluded from download.
A follow on to this would be to delete episodes that fall outside of this limit to make room for the latest episodes. For example, to keep the latest 3 episodes of Marketplace Podcast which comes out daily, one would exclude by 3 days since publication and allow 3 episodes to be downloaded.