After playing with Quark Oddities' pipes, I came up with a few things:

• Ability to disconnect pipes from each other or from inventory like this (with some kind of wrench, or just right-clicking on side of the pipe with hand)
• If you have an intersection, pipes will distribute items randomly - I think it would be better and simpler to distribute items 1:1

I know, those pipes are made to be simple, but still, I think this would give you more freedom about how you build things.

1. Is specifically counter the pipe's design.
2. They do already distribute them randomly.