This evening I was reviewing my travel plans and saw I was downgraded from F to J on the DXB - ATH portion ex SFO. I read through this thread and decided to phone EK to see what they could do. The agent was clueless and when I asked if I could just reroute to MUC he put me on hold and said yes I could, they would waive the change fee (on a full F flex fare ticket?!?) and charge me the fare difference. He also asked me how I found out about the change, which I thought was odd. I thanked him for his time and just sent an email to customer affairs in New York.
To that end, I am reading some conflicting posts and am unsure if I have a EU 261/2004 claim (of course after flying)? The ticket was booked by AMEX (US) ATH-DXB-SFO-DXB-ATH. I would be fine with EK changing my ticket to MUC in F, but the one agent I spoke with said it wasn't possible.