I like it a lot as two separate albums. A main reason of this is as a double-album it wouldn't gel if disc one was Deliverance and disc two was Damnation. Listening to them back to back doesn't feel cohesive to me (aside from the fact that Opeth in general feels cohesive if you know what I mean by this). So, for a succesful double disc you would have to intersperse the songs and mesh the albums together. And this is where it doesn't work. Damnation's predominantly clean nature obviously separates it from other Opeth albums, and its quiet, sad, reflective feeling creates a tension, drama, and reconciliation unique to it. Benighted, Credence, Harvest all work because they are unique within the album. If every other song were clean and a little more straightforward compositionally it would be a far less interesting listen for both the Damnation and Deliverance songs.