Reducing the weight given to the SAT is not giving people of color preference, it's giving them a more level playing field.
If you can't figure out that reducing an unfair advantage is entirely different from creating a disadvantage then I think this conversation is above your level. The only way your argument makes sense is if you believe the scales aren't already tipped in favor of whites. If you believe that, you aren't being intellectually honest.
I'll make it simple. If you play a football game with 12 players against a team with 10 players you have an unfair advantage. Removing the 2 players from one team, so that both teams have 10 players isn't creating a disadvantage for the team that had 12. It's leveling the competitive field of play.
Giving more weight to a GPA because the SAT has proven to be 1) less reliable and 2) culturally biased, doesn't mean whites are somehow disadvantaged. It means the advantage they previously enjoyed will be reduced. This is about equal opportunity. If the SAT hadn't already been shown to be less important than the GPA, and culturally biased in favor of whites, then I wouldn't be arguing against it's importance. But it's seriously flawed, and results in whites being given an advantage.
Increasing state enrollment will prevent whites from being disadvantaged? Why, is that because there are no black people in Connecticut? Unless you increase state enrollment for whites only, your proposal won't do anything to keep whites from being oppressed.