Ok, after a bit of time of fiddling and shooting, here are some of my initial findings:

Single handed operation is very very easy. You do NOT need to remove your eye from the viewfinder for almost anything, except for accessing items in the menu. For example, on the A700/850/900, deleting a photo involves 2 handed operation. On this, your right thumb controls nearly everything.

Though buttons are a lot, which is also a good thing, layout and common used buttons are very well placed. Nearby buttons are separated with enough distance and height to be differentiated without looking.

Exposure compensation button should be swapped with WB button as WB will be used more often than EV comp (which I have customized to be adjusted from the rear dial).

EV comp button cannot be customized as well which is a waste as it is one of the many buttons that has little or no usage.

Shut down is slow. VERY slow. Although the screen has already blacked-out, the shutting down process is still in progress, shown by a much delayed cocking of the mechanical shutter and lens returning to infinity.

When using mechanical first shutter, shutting down takes about a second longer compared to electronic first shutter. I believe it's due to the need to return the mechanical shutter back to home position.

As opposed to popular believe, turning on the camera isn't that slow. Upon power on, the image feed immediately comes on the rear screen. Followed by a delayed information data to show on the screen. From turn on to 1st click, I would say it's pretty short at about a little more than 1 second.

EVF... one word... WOW!

I'll update more as needed.