Draw-to-place L-shaped pipes with automatic undergrounds. R to place an anchor, F to flip, Right-click to remove.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Augmented or new ways of transporting materials - belts, inserters, pipes!
After major rework, based on this mod, I released https://mods.factorio.com/mod/pipe-dream.
Thank you miodec! Your work was a great starting point.