+1 on everything.
Now that we have a radio trigger for flashes, which is small and light, there's no more excuses for popup flash. They could think to drop it from the D5xxx included.
No compromise on the viewfinder: better a brighter and bigger image.
Popup flash or not, I still ask for a less prominent housing: I still like to read the F/stop on the dial of my old lenses, and possibly anything to block tilt/shift Nikon or non-Nikon lenses with user selectable free rotation, and not just limited to 90°.