I couldn't possibly disagree more. I think the album is full of fantastic ideas. Take "Era" for example.
Once the piano bit at the beginning is over, the rest seems so simple (monotonous?); the guitar just gallops along, keeping rhythm, leaning on the one note (or nearly) through two lengthy verses. The vocal melody isn't very dynamic either. But then you start to realize that the drums are where real musicality of the piece is. Axe is just killing it and I notice some new facet of his playing every time I hear the song. Where are the keys? Oh, there they are, subtly providing an expansion of the vocal melody. Then when the chorus kicks in, (even though the song is still going at the same pace) the tension release from the verses is brilliant. We get a soaring lead break with, once again, the drums providing the bulk of the background musicality to the guitar. Just gorgeous. The chorus comes back but doesn't over stay its welcome.
I understand that people, especially those who miss the ol' Opeth, might not like Sorceress. Calling this album "poor songwriting" and/or "uninspired" seems so off base to me that it's not even wrong.