Blade- You're right if WGT sticks to this hair-brained idea of moving people up without taking into consideration any time frame whatsoever. As the game ages they will be forced to factor that in or they will lose a lot of their recreational players like the OP and I.
Under the current system a person who plays every day and posts a magical 63 once a month will still be arbitrarily moved up in a little over three years despite the fact that their overall play and scores really don't justify it. Somehow they need to consider more than just the lowest scores. I believe they need to factor tournament results as well as credit game results to move some people up (the sandbagging problem) while dropping scores a year or year and a half old from consideration.
WGT really has to perform a balancing act to get these systems to work.