As of now, podcast are unorganized, and the only way to find different podcasts of the same creator, radio or newspaper is to just “know” their title and search them individually.
I think it is necessary to introduce creators pages (could be called “channels”, or “radios” or whatever), as for artists in the music section. This way, users could find and subscribe very easily to other podcasts from the creators or radios, and creators themselves could have a better way to organize and promote their offer.
I think a feature like this will be necessary eventually, because as of now the search process is very chaotic and not enjoyable/satisfying.