I completely agree about the micropub point. I currently use Podcast Addict on Android to listen. Although it has a lot of functions I find useful, I get rather frustrated with workflow for creating listen posts. I am wondering if you have a particular workflow?
That is a really good point about Huffduffer Chris, I had not really thought of that aspect. Personally speaking, I like the serendipity of the collection feed, even if somebody has not listened or liked a particular podcast.