The state determines CREDIT awarded for standard curriculum classes. The WEIGHT applied for GPA is determined by the school. Because our school never counted AP science as 1.5 credits, these rules did not change GPA/rankings at our school.
The rules changed YOUR district’s policy, by not allowing 1.5 credits on the transcripts for AP science classes. It also de facto changed the way your district’s GPA calculates because GPA is credit x weight. The only unfairness that would occur at your school is if some students took AP science courses as freshmen/sophomores and still get 1.5 credits. BUT, your school board can fix the GPA disparity by changing the weight given to science APs to make them equivalent.