Thinking about the "just give me a QR" thing and maybe when we update the <funding> tag we add an entry for a single lightning address then apps like mine can offer a QR option and just make an invoice for that one address.
That removes splits but its no different then having a PayPal donation to a single account.
Thats the only way I see to do it since there is no way to do a single QR with splits that I know of unless the podcaster runs their own setup for it.