I am not satisfied on my side,
From my understanding Flying Blue Platinum are the real loser in this agreement between Delta and AF/KLM.
I found unfair to see Platinum/Diamond from Delta have access to seat in Economy Comfort on ALL flight (at booking), when Flying Blue Platinum have access to Comfort+ ONLY on north America to Europe Flights.
I also see Flying Blue is looking to eventually change the program to the same "base" of the one of medallion Delta.