There I have to disagree. The most frequent reaction I see from creators from the Big Two (and their smaller imprints) when racism is mentioned is defensiveness and denial.
Take Jason Aaron and Scalped. When people fluent in Native American history (some of whom happen to *be* Native Americans) talked about how stereotypical some of Aaron's Native characters were, he promptly flipped his s**t, pulled out the "I'm NOT a racist!" card, and hurled insults back at some of those people. So, no. I don't see a tendency from creators to rethink their choices at all.