Yep. The sufficiency argument is hopeless. Indeed the patent office will have considered the patent sufficient in order to have granted it in the first place.
The NDA discussions were part of Nanoco's attempts to more firmly establish that Samsung was indeed using Nano's tech. They knew full well that the info contained could not be used at trial. They didn't need it.
The formal sale process was a red herring. The company was not going to be sold. It was a fishing exercise. As were the 2018 NDA. Nanoco knew full well this would be going all the way.