The feedback loop is a specific goal of podcasting 2.0. One goal in particular is cross-app commenting such that if you leave a comment on a podcast with Podverse you'll see it in Fountain, Hypercatcher, PodcastAddict, Overcast, Castomatic, etc. The "big players" (Google Podcasts, Apple Podcasts, Spotify) have little or no interest in this as it would break down their walled gardens that they think is their key to making money (except for Google -- I don't think they see podcasting as a revenue thing for them beyond expanding the psychographic/marketing profile of a user).
If they want to break their walled gardens, they should just outright build a better protocol. The reason why Apple and Spotify have a monopoly over the money-making side of podcasts is because they pay for hosting and make aggregation simple. The average user (and many developers such as myself) have no interest in adding Bitcoin transactions to our podcast experience, or unifying our commenting experience. I just want my podcast on my doorstep every morning, and unfortunately Spotify still is (and likely will be) the best place for me to get them for the foreseeable future.
For more info: https://podcastindex.org/