In the meantime, I'd suggest that folks impacted in either direction (DL FF program flying SAS or SAS EB participant flying DL) be prepared to show credentials (FF card or equivalent on phone etc.) and to ask airport agents to add or verify FF numbers. This might require a bit more time, so try to arrive at the airport somewhat earlier than you normally would. Save boarding passes and receipts if you're hoping to request credit later for flights in this interim period.