The body could be rounder, it's not that comfortable to hold at the moment, the side lines on the left & right of the bottom case are really unnecessary, though if does make the body appear to be a little bit smaller, but I am all for comfort.
Also the little "feet" the 4 dots at the button should be replaced with something else too, it's very uncomfortable to hold with those dots underneath, I find myself constantly avoiding those dots.
firmer shoulder buttons
Non-shiny top cover casing, I think it will look way better with whole body in same matt finish. Being shiny is so pretentious... and it smudges easily...
6.5inch 720P edge to edge thin bezel screen
Intel Core m3
I don't mind a slight more heft added by a bigger battery to accommodate the higher spec!