Given your workflow, I woudl not shift to View NX2 under normal circumstances. But if you have an untouched NEF file for a particularly problematic image, View might allow you to use some alternative settings like ADL or auto WB. View also provides immediate ability to process images from new cameras that may not be supported by Adobe yet. Most of the adjustments can be made in alternative software of your choice.
The other opportunity is if you have a need to shoot JPEGs or simply want the in-camera image to be more accurate for purposes of the histogram or LCD, you can better tweak and use the Picture Control by experimenting in View.
I don't see any real need to shift away from Adobe DNG Converter if its working for you.