I really see no need at all for any change in the weight classes. When a kid finds himself in between 2 weight classes, he cuts weight and gets down to the lower weight 90% of the time. As far as the lighter weights go, there are bigger gaps between them as there are fewer bodies to fill the weights. How many jv 103 pounders are there that could go up to say 108 on teams around the state? Or if some of the 103lb studs go up then 103 becomes a weaker weight. As for the upper weights, the guys can handle the weight change. If a 230 pound kid can't cut down to 215 then I'm guessing he's already a muscle bound kid who shouldn't have much of a problem wrestling the heavier 285 pounders.
If you look at most teams and how they're put together, you will see many more middle weight kids than higher or lower weight. This is why there are more weights around the middle with lower weight changes in between them.