I've always said it is beyond remarkable that both in HS and in College the knuckleheads in charge decided to go with an even number of weight classes.
As far as adding a weight class, it is absurd to add an upper weight. The best HS wrestlers are in the middle weights. It's painful to watch the big kids wrestle because so few of them have any talent, and of those who do a big portion of them will be playing football in college and unavailable for wrestling.
It's not as if all of a sudden some big, talented kids are going to appear out of thin air. Perhaps redistribute 174 and above (175, 188, 205, 285?), but don't add a weight class where there is less talent.
First, I would bump 125 to 128; because it's hard to imagine there are any top 125 pounds who aren't sucking serious weight. Then add a weight class in the middle and distribute accordingly.