I can definitely see why people would find the more ambient, atmospheric parts of Heritage to be boring, but I think criticizing them for having "nothing going on" is kind of missing the point. Songs like Haxprocess aren't really eventful, but that's not what they're going for. Rather, they're trying to capture a mood, and the more ambient, subdued composition is there for that reason. Personally, I think it works really well, and the lack of music like that on Pale Communion (except for Elysian Woes, I suppose) was one of my biggest disappointments with it. But like I said, I can understand how that's not everyone's thing.
The production on Sorceress isn't that good, but it could be a lot worse and I don't think it really gets in the way of the music all that much.