Nikon make cameras and lenses (plus a host of other optic stuff) and with the onset of the digital age, have been compelled to get into software authoring.... which they're not very good at! The interface of NX2 is awful (fair enough, I only used it for the 60 day trial) and it suffers from several bugs.
Why don't they give it up and stick to what they do well... making cameras and lenses? OK, they have to have computer bods in house to work the digital data. That doesn't mean that they'll be any good at creating user friendly software. So, why don't they sell the NEF data to Apple and Adobe, and cut a deal with one or the other to bundle their software with Nikon cameras?
I remember I bought an Epson printer a long time ago that came with Photshop Elements bundled "free". It was miles better than than Epson's picture editing software.
Imagine using LR or A2 with the camera settings available!