I think it's time for a metal body to make the GH3 more suitable for the kind of use my GH2 has been getting and a battery grip option is essential given relative short battery life inherent in a camera with a non optical viewfinder.
Second control wheel
!
Size is perfect even though I have chunky hands but more prominent (stick out a bit more) buttons on the main dial would make it more intuitive to use.
In camera IS for all those lovely legacy lenses