Can you give specifics? What were you disappointed about regarding camera design and the footage? It's always good to hear differing opinions.
I saw problems in the transitions going from the mids into the dark areas and I know this probably happened in the grading stage and it is typical for me when you are working with images shot in 8 bit. What people were complaining about as noisy images during the presentation in Hollywood, is probably not ISO noise but rather the limits of the available color information. In other words it probably looks good as shot with a very nice DR, but it won't hold up when serious grading or FX start to happen.
A 10bit mpeg2 image would only take 25% more bandwidth (62.5Mb/s). They could have done this in a heartbeat if they had wanted to and those transitions would have had what they needed.
Just as in photography, sometimes it's what you chose not to include which tells the real story.