I have been thinking the same thing. However the new Phantom 2 has a spring loaded throttle that at first seems like a step backwards, especially if you have experience flying RC helis or planes, spring loaded throttles are usually for as a toy setting. However the more I think about a spring loaded throttle for the Phantom 2 with the sole purpose of shooting video not joy riding, it seems like a good idea as it will hold that altitude. Can you set up the throttle stick on a Futaba with-in a way that as you pan left and right with the throttle stick and you are not constantly effecting the altitude aka throttle? If you watch the people flying the Phantom 1 when they pan left and right the Phantom will raise or drop as they accidentally adjust the throttle also.
Also..How much further with the Futaba 8 or 10 carry the radio signal than lets say the stock Phantom 2 TX RX set-up?