I was not aware that the Lottas had "bare the midriff" type uniforms. So yes, the military shirts currently in are heavily effected by what we do have now. I'd love to see more factional colour - there's some, but not much. For example, in the old character creator, the Amarr had these outfits with a collar and all kinds of wires showing. Similarly other races had all kinds of devices in their clothes. What we have now are... clothes.
Similarly, while the current military design is alright for practicality, I find it unlikely that there would not be, say, jumpsuit/sweater-based military uniforms. Though then again, giving fashion designers free hands might tend to lead into haute couture outfits which don't really look practical. (For example, the high-collared coat is kind of skirting it.)