Ray,
Good solid questions.
I'll try to answer in the same way.
First off, the issue for me is using the viewfinder.
The brain is a funny recording device. When I am ready to frame, I raise the camera to my eye and immediately, my left eye closes. It won't listen to me at all. So I am adapting to the finder like I was using a SLR.
I like framing with 2 eyes but it ain't gonna happen this way. The AF is very fast and accurate with the target at it's smallest size.
The articulated screen is great and once again supports eyes wide open. It's not the fastest way to work but then again, nothing compares to it. So, the screen is great for being unobtrusive, if that's what you want.
I think once you develop and work a style, the camera and you create a synergy together.
It's that middle ground of compromise that exist the images. My style isn't effected by the camera, just my method of operation.
So far, it's a great camera and I am just starting to get used to it's potential.
One thing....I picked up a GF1 because the interface issues are easier to handle than with the Pen2.
I live the Pen2 but it sleeps gently,
for a spell.