Its an app that downloads mp3 files off the internet. There’s not a whole lot of secret sauce there. There are dozens of other apps that you can use if Pocket Casts doesn’t suit you any longer.
That’s what it does now, yes, because it’s a good citizen in the open standards podcasting ecosystem. I hope it remains so.
As for other apps, I haven’t found anything that suits me as well. PC has a decent UI, is user (as opposed to publisher/advertiser) focused, and syncs between all my devices. It’s a truly great indie app. Rarely are such things improved by acquisition.