the spec supports lnaddress already. I've been using this in test feeds for months eagerheron90@zeusnuts.com
We also have demo apps that use NWC but the feeds have mostly keysend addresses so Alby is the only option we can really use without payments failing.
The RSS feed is also the source of truth so we have to go by what people put in them.
Oscar at Fountain wrote this that covers the issues.
https://primal.net/merryoscar/open-podcast-payments-with-bitcoin-and-nostr