Im sure something that would go appreciated for the SR is having a value to it so racers can understand how close they are to going up and down a rating.
Example - I am trying to to get the 10 Races in S Safety I got to A rating did 5/6 clean races and no progression, one bad race and I am back down to B.
It would be great to know how close people are to getting promoted or relegated a safety rating, maybe make it similar to the PI (S500/600, A400/499)