After listening to this song over and over, I get a real Master Of Puppets vibe, and I'm totally ok with that
I think the Lars thing is pretty easy to understand (and at least in my world has been going on well before the Napster stuff). No matter what someone thinks about the music itself, technically speaking, the guitars/bass are top shelf. And Hetfield is a fantastic vocalist/charismatic frontman. Then Lars is just sort of there. He isn't great, but everyone around him is, so it sticks out. It's like the Team USA Olympic basketball team (to continue my sports and Metallica metaphor): Harrison Barnes is fine. He's a good player. He's also the 12th man on a team filled with superstars. Lars is Harrison Barnes, the rest of the band is Durant and Melo and Klay and Kyrie, and the jokes write themselves. It's sorta a compliment to the rest of the band, if you think about it.
Has anyone actually seen them live? He messes up all the time. It doesn't feel like he's progressed his craft at all since AJFA (which I think is his best work). Here's Joey Jordison playing "Creeping Death" with them live. The difference is nuts: