How about the subsystem targetting panel. Currently you have to scroll through a potentially quite long list of modules to find the one you're after. What if they were divided into categories, each with its own column that will fit nicely into the one screen. Column one could be internals (including things like cargo hatch), column two could be optionals, column three could be hardpoints, column four could be utilities. Or something like that.
The keybinds for target next/previous sub-target wouldn't need to be changed.
The keybinds for target next/previous sub-target wouldn't need to be changed.