Yeah, this has always been the case. The artwork isn't dynamic like that. I'd love to find a solution for this. Thanks for bringing it up, I will look into it!
Getting the uniform colors correct is challenging. I don't believe our artists have a way of converting PMS (thread) colors into accurate RGB (graphic) colors. We do have the school's RGB colors from their logos, but once you put it on a uniform model and put it in game under different lighting conditions, it will not look the same. There is a LOT of tuning done on the colors of the uniforms, and they need to work in all lighting situations (day, night, snow, etc). We try to get it as accurate as possible.
I don't think we will be able to make uniform options that don't really exist. All our art has to be approved by the schools, and there is a good chance we would be asked to remove a lot of it, wasting a lot of work.
Creating alternate schemes is certainly on my radar!