The Complete Hemorrhage in Dub Collection by Jay Hinman! It struck me - based on the count of how many people streamed or downloaded them - that the 8 Hemorrhage in Dub spin-off podcasts I've done were actually kind of well-received, often even more so than our regular podcast.
I think "have been" would fit better with "have done". Using present perfect means that he has done these dub podcasts up to now, so they have been well received up to now. It is logical.
Does past simple emphasize that each one individually was well received not the whole lot. Or does it mean that Jay is not sure that the next dub will be well received? It does not depend on him while he is sure to make a new dub podcast.