I think if I had to pick a few potential selections that I think are more deserving than what made the list I'd go with some of the following which I enjoyed more than any of the current nominees:
Sully, Cafe Society, Elle, Julieta, Staying Vertical, L'Avenir, Crosscurrent, Aquarius, White Girl and I'm holding a spot for Personal Shopper, which I haven't seen yet but I tend to love almost everything Assayas does.
Of the actual nominees I think Hell or High Water was my favourite and then probably Moonlight, but I didn't love either. I liked them enough but they didn't really wow me. All the ones I mentioned (with the exception of Personal Shopper for obvious reasons) wowed me in one way or another and really left a mark with me as a viewer.
Edit: somehow forgot to mention Silence, which I also throught was fantastic.