The purpose was to limit the extremely large brackets in a few of the weight classes for the 6U state meet. Without qualifying tournaments, these bracket sizes are just stupid. In one of our "small SEK" tournaments, we had 20 kids is the 43 lb weight class.

I may use the 2 lb size difference to allow us to bump up 2 lbs instead of 3, we are right on the edge now and I am not going to make my 6 year old cut weight, even 1 pound.