I really like the idea of complicated pipes, and had fun trying to make specialized builds that broke down a specific item. I was never very successful. I remember messing around a lot with the pipe "sleeves" that reverse suction - I feel like I never understood really what those were doing. In TC5 I just went straight for the transfusers (? flying essentia) for convenience.
That's just my experience, I don't know the right answer. If complex pipes were still in TC6 I would enjoy re-learning - and hopefully mastering them. If not, that makes sense to me too.