Huh, not really understanding the critique on the mix here, to me it sounds better than PC, because in PC the bass was a bit overdone (a bit too "punchy", if that makes any sense) for my tastes and I feel the vocals have a better presence in the mix here (especially the vocal harmonies), they are a tad more to the front in general, which I prefer. Sorceress sounds a bit more lively and "sharp" to me than PC.
Anyways, I love this album, including the bonus tracks. While Opeth is one of these band where I love some songs but not many of their albums as a whole, this one knocks it out of the park. There is a certain catchyness to the songs that the last two albums lacked and the album paces incredibly well, with the songs taking many different directions musically. Wilde Flowers, Era, Spring MCMLXXIV, and Strange Brew are probably my favourites.