The screen is gorgous with much more vibrant color than my NR. Sorry, I don't have an NX70 for comparisson. At about 10% brightness, it's as bright as my NR on full, and much more crisp.
1. I don't see a noticable tint, but I'm not very sensitive to that. Every color is bright and intense. The yellows and reds on the NR always disappointed me. Looking at the same image side by side on both the difference is unbelievable.
2. No wavy shadow!
3. It feels mushy sometimes, other times it feels about the same, but aside from requring a more firm push, it doesn't seem to be an actual defect (yet...
) Every handheld I've owned has had a different screen texture, each has its advantages and disadvantages. Provided this doesn't develop into a larger problem, I'm happy with it.
4. The screen half feels much lighter to me (maybe partly because the base is heavier), and seems to spin very smoothly, and slightly easier than my NR. The click into either position is less pronounced, which I kind of like. For some reason it also seems like you don't have to lift the screen as far to be able to rotate it. The slight indentation in the keyboard side might be part of it. The hinge itself is very smooth and has a sturdy click in the fully opened position. No scary grinding noises like on the NR. The whole screen part is thinner and lighter but seems more well-made, none of that fragile plastic-y feel. We'll see how it holds up under use.