I guess I'm one of the "lucky" ones with the success of my Accor account merger, it took an extra day, but didn't affect any of my plans.
I don't see anything new with the typical bumps being experienced with these consolidations of very different IT systems. You don't have to go too far back in history to see similar "debacles" with the mergers of what became American, Delta, and United. I doubt the Marriott/SPG will be any different. Given time, I'm sure they'll work through the issues and get things fixed. I can stomp my feet and call this a disaster, but I have bigger things in life to worry about. Time for some coffee...
OK, maybe Accor might need some *extra* time to sort things out.