"Reweighting was based on data collected from incum- bent ATCSs who took AT-SAT on a research basis; some of these employees achieved overall scores less than 70 (that was one of the reasons for the reweighting effort – a belief that incumbent employees should be able to pass the entry-level selection test)"

This is akin to schools that got rid of testing requirements. Agreed it was a terrible choice that should get reversed. But, to say that standards went down on graduates of the schools, you would look at the scores of graduates from said schools.

And to be clear, the expectation of lowering standards for admits to a school would be a higher dropout rate. More stress on the school and testing protocols. But this is not, itself, evidence that graduates are worse.