Just saying it's "integral" doesn't mean it's good or can't be better. It's in my top 3 of their albums but it would undoubtedly be #1 if Lars didn't mess with it.
Listen to the work Jason put in that just got nullified by Lars.
I've listened to And Justice for Jason and I think it sounds really good but I'm biased because I'm a bass player. If the whole album could be properly remixed with the original bass tracks then I'd love it even longer time than I love the original.