So I just finished this game.
With Far Cry 3 I loved the first part, but then when you got to the second island I was like "oh come on, I have to do all this shit a second time now?". Far Cry 4 I thought was a cheap and boring reskin and I got sick of the whole collectathon and tower crap.
Far Cry Primal however I thought was a fantastic game. The setting isn't just a reskin, they really managed to capture this primal feeling perfectly imo. Characters are interesting and positively bizarre, some of the environments and lighting are really beautiful, the overall mechanics are fun, the ancient animals are cool etc Also the game doesn't overstay its welcome which I also appreciated.
Yeah had a great time with it. I enjoyed it quite a bit. Loved how they managed to make the fry cry engine and pull it back away from guns and political intrigue of FC4.