I installed the new firmware and checked it out briefly but haven't really used it. I haven't used my 7D much since I got my 5D3. Did they change the behaviour of the C modes? I never found them very useful on the 7D because they revert back to the stored setting when the 7D "goes to sleep", or when you change to a different mode. I
prefer the way the C modes work on the 5D3. If you change any of the settings while shooting in one of the C modes, it retains those setting when it goes to sleep, and it updates the stored C mode setting when you switch modes. I think you can change the way that last part works, so that it doesn't update the stored settings when you change modes, but I prefer to have it update the stored settings.