TL;DR
I believe it would improve the user experience of the game if there were controls/actions on entire transport lines of belts: specifically, one to reverse them and one to mark them for deletion.What ?
The recent FFF on a whole-belt reader https://factorio.com/blog/post/fff-405 offers the possibility of more whole-belt operations:- There is no easy way to reverse the direction of an entire transport line. This propoal is for a control/key to reverse a belt segment (just as R rotates a segment) and an alt- or shift-key that performs the operation on a transport line (from end to end, or at least from splitter to sideloader)
- There could also be a control to extend the deconstruction of a belt to the whole transport line.