So, I was just looking to see when my next promotion would be and I realized that the XP required for the higher ranks is off the charts. I've been playing more than most (not THE most, but certainly more than most) and after 2 years of playing my XP is ~4100. In order to reach the highest rank a player needs 150000. At the rate I'm playing that would take close to 75 years and my wife already thinks I play too much.
This is less of a suggestion, and more of a pointing out of an error. The numbers for the higher ranks NEED to be adjusted downwards...significantly.