So, as silly as it might be, I've been thinking over these colors for a couple days (or at least when I swing by GH). The white legends do look very clean, and I feel the white is still thematically on-point as Unit 02 in the original series still has white on its face, and the Flash logo is classically rendered on a white circle. I'll concede the Iron Man tie would be a stretch. In terms of design, the white legends are an improvement on the orange as the contrast is better, so the legends are more easily readable. Since the orange and red are tonally similar, the legends get a little muddled in the sea of red.
THAT SAID, I do think it's also very important to keep the personality of the orange in the set. It sounds like doing all the mods orange might be too cheesy(har), but what about maybe just the bottom row mods, or maybe bottom row/shifts? I don't want to throw too many options out and make it harder, especially considering the time renders take. I'm in for this set any way you do it.