I just chatted with AMEX about my DL branded Plat. card. They said there were no program changes at this time. When I pressed them about the Delta release, they then said that they were not able to discuss the situation at this time. I let them know that the main reason I have the card is for Club access, and if that goes away with out a viable/equal alternative, then my account also goes away.
I will probably call AMEX as well since they record the calls, and let them know my disappointment with these changes and my suggestions to keep me as an AMEX customer. MMMV (my miles may vary...lol).