Have you noticed how universities flaunt diversity statistics on their web sites, but getting stats on socioeconomic background is like pulling teeth, if you can get to the data at all?

While this could potentially lead to “fairer” outcomes, it would likely be difficult and/or expensive to implement. Also, Affirmative Action as an official policy would likely be illegal; what is being described here is the more modern and surreptitious form in “positive discrimination”

It's not based on race since we know white women are the primary beneficiaries.

Affirmative action should redesigned to specifically target the founding/native group of black Americans that were systematically disenfranchised, enslaved, and robbed by the dominant society.

Because when you do that, White and Asian people are still "over-represented". That's really the only reason.