There is this comment on the Dpreview " the worlds smallest... until you put something you need on it...A lens"
I cannot help but wonder how this camera will balance with heavier lenses like the popular 24-70mm and 70-200mm f/2.8 lenses on it. The grip may very well be a necessity with top level glass (which does tend to be rather heavy) for instance I get cramps in my wrist when I use a Canon 5D with the 24-70mm f/2.8L on it - which is one reason why I skipped the 5D cameras and went straight to the 1 series - they are designed with big heavy lenses in mind. To my eyes the FE 35mm f/2.8 isn't really any smaller than the DA35mm f/2.4.
And with the mount adapters this camera are going to make the camera even more awkward to handle -
look at that thing, it's a frigging brick!