I like the white banners to show they are routing. The problem is all routing units are white. We need an easy way to tell whose unit they are. Perhaps an "X" on enemy banners?

As for leaving your banner it's normal color with a duplicate white banner, I dislike the idea. Afterall, if I look down a section of the line and see my banner flying I assume they are still fighting. If I don't see my banner, but see enemy banners and some white banners, then I know the fecal material has hit the fan.