I learned the part about the number of officials.
You argument using one changed call per game by the league office in the last week does not significantly affect the grade of a crew unless we are talking 10 to 20 calls in a game. Then it could range from 5 to 10 pts. It sounds good and looks good and may have provide a perception issue but it is not statistically relevant. Argument was week at the foundation. Extrapolation was flawed.
You stated you know people and have talked to them but failed to mention any strong evidence to counter Mr. Rush's statement that NBA refs need to grade out much higher than 68% and that actually they need to be higher than 90%. You just stated that it could not be with no proof. If you have some, cite it or comply with the thread starter's request.
Mr. Rush was in charge of officials for some time so his info and expertise qualifies him as a expert and so your argument needs to cite another expert with similar credentials.