What's wrong with By the pain I see in others?

What's wrong with By the Pain I See In Others:

While displaying some of Mikael's riff-writing at its best and has some memorable moments, it's mediocre compared to other Opeth DM epics and employs 5 net minutes of near-silence so that some vocal tracks off Master's Apprentices can be heard in reverse.
 
It would be a good song for any other band, but Opeth's standards are really high. There's good elements here and there, maybe they should've gone longer with that Middle Eastern sound experiment. The metal parts are just boring.