Nice reply with firmly made points using the ALL CAPITALS IN GIANT BOLD LETTERS shouting style. But oh boy, did you miss the point? After reading all the explanations about focus by wire and how the focus work on the lens and how to use single autofocus + manual assist and yadda, yadda, yadda, yadda, I was sure you totally missed the point. I didn't say it's a nightmare to focus because it's not real manual focus or because how the focus works. I said that because the lens is just too small. It's an ergonomic problem. The lens is so thin that it's hard to access the focus ring, specially without getting your hand in front of the lens and in the shot. Now, my wife has much less of a problem with that, because well, she's a girl and has tiny hands. But I have a very hard time. Try to pull your own focus during a shot while you pan and tilt and tell me how that goes. Now, if you are one of those shooters who rely on auto focus then this is a moot point. I don't.
Of course it's my opinion. What else? But I have seen several people complain about this very same thing here.
I thought the only thing that mattered to you was "Image Quality"....... Now think about your post regarding the 20mm by Panasonic to then understand what we have been telling you about the GH2 to GH3..... Think about it......
Just like I told you, "Image Quality" is not the only thing that warrants an upgrade/change.