Think about it this way, even with a higher influx of 460+ candidates, the CRS point decreased by 5 points! If I follow your logic the point should still be at 470. I doubt this influx is constant for future so I believe it should reach 450s by the middle of September. One thing to bare in mind is the PNP or Skilled worker draw potentially could happen at the end of September, and that could lead to another surge of CRS points. However according to last year's schedule after September the draws will continue till early next year without disturbance. I am counting on my 456 to be drawn by the first draw of September.