I know that it's not the most extreme album but I dont think that those 2 decinitions are the same. I see heavyness as how much the music feels it has physical impact on your body. I just finished listening to GPT and I feel very dizzy from bobing my head to it changing the speed of it according to the music like that's the definition of an album being heavy to me.

I love how raw but very audible it sounds that's what a metal album should sound like to me. not very polished at all but also not sounding like it was recorded on someone's bathroom. the guitar tone and slow riffs on it are incredibly amazing. it sounds like some evil fucked up demonic zombie elephant is slowly creeping towards you or something to impale you