I think anyone who listens to a lot of podcasts is still going to want a more serious app. I've never heard of Pocket Casts, but it looks really nice. I use Downcast and I see no reason to switch and lose features. Apple's not going to build auto playlists or server fetching.
Pocket Casts is excellent. The killer feature is server side feed updates. I subscribe to around 20 feeds. Checking for new episodes takes less than a second using Pocket Casts, every other apps I have tried takes at least two minuets.
