Considering how strict Ian and the mod squad are at cracking down on even covert racism and misogyny (just look up "Gamergate" on the Hall of Infamy if you want proof) I am not really sure standing on your soapbox here is warranted. It is also derailing this thread even more, so if you must continue this maybe take it to Chat? This isn't the place to discuss whether or not the mods somehow act to shield proponents of white supremacy.
Don't feed the trolls. Starting an off-topic argument is exactly what they want.
Back to the OP, it certainly could have had interesting effects to see Columbia stay as the prominent figure. It could be a symptom of a more warlike USA; Columbia was often depicted as an aggressive defender of liberty, as opposed to the more caring protector Lady Liberty embodied. One easy way to do this would simply be to eliminate the statue of Liberty; or change it to fit more with Columbia. A Columbia Statue would be a lot like the other depictions of her, wrapped in the flag and wielding a sword, a much sterner defender of liberty (or so the propaganda would say).
In terms of practical effects, I would again argue it would be a symptom, not a cause, of a different USA. Symbols show how things are, they don't change things in and of themselves.