Designing pipe networks isn't so easy as it could have been.
As for me changing geometry and size parameters of pipes (i.e. slopes, size, top and bottom outer diameter elevation, centerline - not just invert as it's possible now) and structures via right mouse click and looking through specific element props - is NOT user friendly.
I would love to change all those (more or less) directly via PROPERTIES PALETTE, including in pipe or structure profile view.