I don't think the problem with Heritage was that it sounded different, but that it was new territory for the band at the time, and it takes time to master something. I still think it was good, but an album in that style could be even better. Look at the early albums, few people consider Orchid or Morningrise to be the peak of their sound, but after that they released My Arms, Your Hearse, Still Life and Blackwater Park.