Context: desktop site which shows data. The main menu has from two to four levels.
Without the possibility to change the page content and the menu architecture, we have to optimize the menu view. The current site has an old-style drop-down menu, and every level is opened at the mouse over.
We propose this kind of visualization and disposition (see image):
but when one of the second levels has not deeper levels, there is too much blank space and the items are not so visible.
How to deal with mega-dropdown menus with inconsistent content?