I think Gossow is a much better death vocalist than Liiva, but Burning Bridges and Stigmata just had so many well-written songs. I think Wages of Sin is one of their best, but Anthems of Rebellion is uneven, and Doomsday Machine is just mediocre.
Basically, if the band went back and re-recorded Burning Bridges with Gossow on vocals that would be amazing. They didn't play any Liiva material when I saw them live, unfortunately, but Ravenous and The First Deadly Sin just blew me away. A lot of the Doomsday Machine material sounded a hell of a lot better live too.