The main problems with the Wembley performance to me are the band were not on the top of their game, and as a result played too fast. Secondly the mastered sound was awful, there was too much cutting into the mid range frequencies, specifically the lower mid range, making the overall sound hollow. And finally the bands energy was pretty low, due to scheduling conflicts between tour and filming needs and the need of the Wembley Arena to be used by other acts, the band needed at least 2 but ideally 3 days but not more than 4 days off before the performance, this would have been a great way for the band to regain energy and Myles to wrap himself up in cotton wool and protect his voice. It would have also have given them time to rent some rehearsal space and get their act together to sound tight.
On the DC3 side of things, id much rather they shot the thing in 1080p and forget the 3D thing, as i have heard that is a steaming pile of doo-doo as well as it has sync issues on many of the cameras as they are out of phase.
DC3 hit pay dirt with Amsterdam and thought it would be a much easier thing with Wembley, but with many new technologies that were being more widely used at the time, and more cameras. They had success with the Creed performance in the interim, so they thought they had track record by then.
Milan will never see the light of day, they tried it on a shoe string, blamed it on borrowed gear and their gear being caught up in customs, as it was. However it was DC3 failing to provide the proper documentation to the customs authority at Heathrow as they came into Europe that way I'm led to believe. They should just have cut their losses and made a more stripped down format with the cameras they had, maybe one or two other cameras as well for a more grainy and more 'fan type' feel, and then take the audio straight from the board. A stripped down and more raw approach to a Live DVD/BD.
It looks, at the moment to me, that DC3 are trying to get their act together by releasing performance DVDs from Brad Paisley and some other country acts. Ive still to see the Brad Paisley performance (I've got it) but i am thinking its more like Amsterdam somehow, or i get that feeling it will be like Amsterdam.