Not sure if it has been suggested but it would be nice to have a "Logic" block that actually did nothing.... but was able to connect to another block like itself and create a cosmetic "PIPE" of configurable colour and width, working on the Helicarrier there have been numerous times where a cosmetic pipe (like the logic connections) would have been very useful, to be able to colour it to any block texture/colour would be awesome and also to be able to alter the thickness of it up to the width...
Cosmetic Logic Pipes
Cosmetic Logic Pipes