i just platniumed it 7 hours ago. It was cool but don't know why 79 is a mystery to you. No multiplayer and frame rate issues. I also can't stand games that have a long load after death. Totally breaks the mood. Especially if you get to a hard part. I had a blast cleaning it up on easy. I was able to run through it in a couple hours collecting the missed items (which might be another negative for reviewers)
I wouldn't personally notch the score down because it had no multiplayer. Also I played on PC so no FPS issues here. Are they that bad on PS4?