If the Watershed (2008) album didn’t alienate most of Opeth’s early fans then Heritage surely will. It's prog rock with small doses of avant-garde in the song structure. There's piano, keyboards, flute, mellotron and no growls. If you listen carefully the shifting song structures are the same as always, but without the death metal masking them they seem more obvious and very awkward. I've never been much of a fan of prog, so 90% of the album didn't click with me.
For those that care, it was recorded on analogue, so it sounds warm and cosy.