The Order of Battle screens are great, providing detailed information about the units. But you can't scroll through them and click to return to that unit on the field of honor. You have to go find them. And it isn't always easy to find the icon above the unit that trips their display information. Other interface flaws are easier to fix.
Rollovers are nice, but they take awhile to kick in.
Those are each very important to the control of the game, but they're too small and too hard to find with a mouse. The sound does tend to be uneven at times. It's true that there aren't any annoying setups or sound card identification rituals, and installation is smooth. But there's just too much going on in the world of gaming to excuse some of the weaknesses of Waterloo. Horses move sideways, crab-like, as they march along.