I did not read all the responses here above. But I just want to share my thoughts on the issue since I just got my EX1 and I´m started to play around with it.
First of all, cameras aren’t getting bigger in the future – that’s an obvious fact. But this also means that you (operator) needs to adjust your self according to the sizes and adjustments. The solution for me was MultiRigPro: http://www.dvtec.tv
With MultiRigPro you´re not only getting good stable grip with your camera, you also have a huge “on production” stability when you move from the rig to your tripod since you can place everything onto the rig (batts, spot lights etc.etc.)
Regarding the buttons, I must agree without having to much experience on the camera yet. They are quite easy to press in many areas on the camera which can lead to operator mistakes in many cases. Then again I think this is something we need to adjust our self to.
But if you look overall on the camera and price, I think EX1 is far from being “bad” choice out there. Its just hard to move from the older bigger cams into such small things.