Related, I had a DL-ticketed, AF-operated PE itinerary in July 2019 that also granted 150% MQMs on the European segment in plain Y. The class on my boarding pass then was Y, which does grant 150% MQM as documented.
So a bug/undocumented edge case for me to get 150% MQM now on a non-PE ticket? I'm curious if it would have worked for longer AF economy flights to Africa or India then. New mileage run idea?
Searched a number of routes and there's no DL C+ fares showing as available from US to Africa or India via Europe on KL/AF metal. TLV is about as far as you can get.