While Im not a huge fan of changing/fixing something if it is not broke, which is what I think is happening with the weight classes here.
I have to give it to them for finally changing the OOB rule. Last year I got very frustrated watching wrestlers back up to the edge and as soon as a foot hit the line a ref would blow the whistle. Hopefully this rule change will teach kids to keep wrestling on the edge.
This is from the article on themat.com
Another significant change was made in Rule 2-1-3, which now makes the boundary line inbounds and, thus, expands the wrestling area. Previously, a wrestler was out of bounds if he or she was touching any part of the 2-inch-wide line which marks the wrestling area.