I like to make a suggestion for the future 2.0, one unit I think would be cool to have is Clibanarii Cavalry. I know they weren't used much in the western part of the empire, but it's still conceivable. They could be sold off as the remnants of King Authors knights.
Another suggestion, perhaps some armor for arm protection. I know the Roman's didn't use arm armor extensively, but they did have it. Such as bracers made of either leather, iron, or bronze. Also I believe they used more extensive arm protection when they fought the Thracian, since the Thracian Rhomphaia was pretty effective as lopping off limbs.
Thanks,