I scored it 115-112 to Jacobs.
I thought he landed more consistently in the majority of rounds, particularly to the body, which has seemed to go unnoticed. I've heard people say Jacobs wasn't landing and was shoe shining a bit, but you can never say that when the fighter is consistetly countering to the head and body, pushing his opponent across the ring in the process. The two don't commute, Jacobs was landing and either stopping Golovkin in his tracks when he did lead, or pushing Golovkin back across the ring with his counters. You can't do that if all your shots are deflecting off the gloves, not against a Golovkin.
GGG rallied in a lot of rounds, but ultimately he was outboxed and tended to come off worse in a lot of the big exchanges. When he got up close he did nothing, and showed that he struggles to work without proper leverage. Jacobs schooled him on the inside and was regularly hitting him to the head and body whilst GGG tried to hold or, lock up with his left and land a big inside right hand.
Jacobs was just more adaptable and the speed difference really mattered. Jacobs was able to chain body shots into his attack so effortlessly, and he was quick enough not to get punished for it. On the other hand, GGG who is known for his body work, was not able to work there at all, despite being up close for a lot of the fight. He likes to throw with specific form, and seems preprogrammed in that way, he's expertly conditioned on throwing power shots. This means he struggles to generate the same flow and power when he is having to trade up close and in the pocket, whereas Jacobs could lean and use upper body movement to fire off combinations as he's slipping and moving. He had that in his locker and it proved pivotal.
I did think that GGG looked heavy legged in the second half of the fight too, and his activity noticeably dropped over the 12 round distance. He appears set in his way when it comes to defense, he chooses to shell up when combinations come at him and is fine to ride them out without any head movement. He takes a lot on the gloves because of his and limits damage, but he's giving his opponents a few seconds to tee off on him. He has a pretty rigid style and I don't see that changing, but I do see more fighters looking to take advantage of that, especially as his legs slow.