Easy customization that can be easily implemented.
In FFA mode, players spawn with random colors and heraldry, but I think that there are some color combinations that could do just as well in the main game while adding a bit of more customization.
For instance, in FFA the Mason Vangaurd class can spawn with a primary black tunic, with red stripes and a silver falcon on the chest. The Agatha vangaurd can sometimes spawn with a tunic that has both dark blue and light blue in it. So on and so forth with other classes. Maybe have these patterns unlock when one unlocks all secondaries for a class.