I am working with Wim (the change proposer), the Workstation WG, and the KDE SIG to make the necessary adjustments in Rawhide to support swapping between PulseAudio and PipeWire. So far, Wim has not been interested in backporting the fixes I've made to Fedora 33, so the plan would be to start producing media with PipeWire on it for Rawhide and set up multiple events over the next few months to get things tested.
I really don't think a few test days are at all sufficient for such a sweeping change. The fact users cannot easily test this on F33 makes it even worse. I understand the desire for moving forward, but this change proposal comes off as premature.