Dave makes a powerful argument, but I think there is one thing that should be pointed out.

A lot of the current angst about weight is caused by the fact that there are only certain battery sizes available that can be used, and with the rules as they are currently, you can generally make weight with the smaller size, but you don't have quite enough capacity to get any life out of thrm, whereas you can use the larger size and have enough capacity, btu then you have to move heaven and earth to make weight.

Given this, a slight adjustment to accomodate either one battery sie or the other is something that would make like easier for a lot of people, without significantly affecting the cost of the sport. (just my humble opinion ...)