.. will probably change heaps back and forth over the next hour or so while I tinker with the formula.
I highly doubt yours will change. What will change is the rankings of people who haven't played a lot of games yet, and people are who effected by the changing rankings of these people.
I think this last one is actually pretty accurate. I was finding before that it was taking players far too long to escape the "not played enough yet" group, but then when I changed something slightly I found it was way too easy to climb the rankings really quickly just by dominating ALC cricket, particularly with the ball. Middle ground now; happy enough with it.