I respectfully disagree. Uncharted 4 was an uneven game not reaching the heights of its predecessors (especially UC2) while Overwatch was a fresh take on FPS games that I personally still play to this day.
Same, I also found Uncharted 4 to be the worst game in the series. While the interactions between main characters were great, the villain wasn't good and the lack of supernatural elements really took the fun out of it. I even like Lost Legacy more than 4. Though I personally don't think that Uncharted 2 is the best in the series, I hold the unpopular opinion that Uncharted 3 is the best.
I also thought that Overwatch was deserving of the GOTY win that year. It's a lot of fun, the first multiplayer only game that was ever deserving of GOTY imo.