I had a lot of fun playing Far Cry Primal but the story is practically nonexistent and the gameplay eventually gets super repetitive (although this probably goes for all Far Cry games). It's one of those games where you're having a good time while you play it, but afterwards feel guilty for spending so much time on it when there are practically infinite clearly superior games you haven't played yet.
It was great and I liked the late mesolithic setting. They could have made the setting around Gobleki Tepe though, that would have made for a much better story.
I wish they spent more time on it, honestly. I'm obsessed with Ice Age era humanity and fauna, but dinosaurs always wind up getting all the attention. I play that and Dawn of Man and tell myself I'm having a good time.