The Cross Section Properties dialog box should have up and down arrows when selected would raise or lower the cross section by a single grid!! instead of having to type in both elevations.
Better yet, when you right click on a cross section, the flyout should have the up and down arrows to adjust the section immediately!!!
See the attached example. Civil 3D spits these out all the time. It seems like an easy fix to right-click on the section, select the up arrow and have the section view jump up a grid and you're done. Am I right?!?!?