I'd think a lot might depend on who/how AS keeps as non-OW partners following the entry into OW. For example, they're currently partners with Latam, Singapore, Emirates, El Al, Korean and Hainan. I'd be surprised if the EK partnership would persist, especially given QR's arrival, but it's not unknown for OW members to keep non-alliance partners. We won't know the final list until (probably) sometime in the first half of 2021. If it was me, I'd probably just be patient for the time being.

BTW, you get AS lounge access with any paid or award FC ticket on day of flight.