I've tried all the indie podcast listening apps on iOS and always come back to the Apple Podcasts app. The things I don't care about:
I don't want podcasts taking up space on my laptop, where I never listen to podcasts
I don't listen to podcasts on any device other than my iPhone, so I don't need position syncing
increase or decrease in speed
Things I do care about:
remember when you could embed different cover art based on the position of the track?
Podcasts I'm not interested in (there are always exceptions):
people talking to each other podcasts
exception: the MetaFilter podcast. In the span of an hour I get caught up on the month's links at the community site
"Turns Out" podcasts (credit to Marco Arment for the phrase). You know, the science or "interesting things" podcasts where they say "It turns out that" a few minutes in.
I can only listen to podcasts while doing something like:
driving (if I drove for any length)
doing the dishes, tidying up
Some people can do it while working, but not me.