It was reported by Ringside News that it was Bruce Prichard who was running things behind-the-scenes. It was not explained why McMahon was not backstage but this is not unusual and oftentimes when he is not at a show, he will call in and give instructions by phone.
Under Prichard, Ed Koskey and Ryan Callahan were said to be the people who led the creative end of things this week and Kevin Dunn handled the production end of things.
RSN also noted that although McMahon was not around that "everything flowed through Vince" all day.
A few weeks ago, Triple H was called in to help out behind-the-scenes.
On a related note, for anyone who thinks McMahon might be slowing down because of his age, we were told a couple of weeks ago that McMahon continues to train in the gym "like a maniac" and seems to be in great health with no signs of slowing down.