Allow me to sum up Uncharted 4 for you, no spoilers. Climb this rock, now climb this rock, now pull yourself up, now climb this rock, now jump to this ledge, quickly shoot those guys, now climb this rock, now drive around in this jeep for what seems like forever and get totally annoyed. Now climb this rock. The end. Did that seem boring? If so, you will hate this game.
GameSpot gave this a 10? Really? Their reviews are so off base sometimes, and lately it's most of the time, that I'm giving up on reading them anymore. Stick to the user reviews, you will get a more accurate review and a better idea of the gameplay. The graphics in UC4 are nice, but if you want to see amazing graphics check out The Order, a superior looking game IMHO. I managed to make it to chapter 13 on this game and just had to stop playing because I was so sick of climbing rocks. There are some fun moments but they are few and far between. Most of your time is spent moving from ledge to ledge and trying to figure out how to climb to the next building/mountain/tower, whatever.