Allow the creation of customized playlists
At the end of the week, I want to be able to listen to just episodes on politics, for example. I don't want to have to go through all downloaded episodes and select the ones on politics to listen to or to screw up the order I keep downloaded episodes in. I also don't want to have to go to each individual podcast, listen to the relevant episodes, then go to the next one, repeat, etc.
I want to be able to go to my podcast, select the episode I want, and download it to its own "politics playlist." Then, I can go to my politics playlist and just listen to the episodes from various podcasts I've added to the playlist. This keeps the topic the same but allows me to listen to the multiple takes from individual podcasts, which is especially useful while driving or working.