"Max Episode Age" setting for the "Feed Customization - Override Global Download" option
Add the option to customize a feed\subscription to limit the Number of Episodes AND the Maximum Episode Age. The max age should be customizable to limit by; Day(s), Week(s), Month(s), Year(s), or a Fixed Date.
Consider, for example, you have a daily news podcast where you want a custom download setting to A.) limit the downloads to a Maximum of 3 episodes, and B.) limit the Max Episode Age to say 1 week old.
Without the Age limit, if you download daily, you will get two archived unlistened to episodes regardless of how old they are. The solution to that may be to have the setting to only download the last 1 episode. But then if you miss a few days of downloading (say a week for this example), then you only get that last 1 episode and you want the last three days worth.
I suppose someone may want Episode Age Limit as a global download option as well.