If fighters fought at or around their natural weight

What would the divisions look like if fighters fought at or around their natural weight? By that I mean, if fighters didn't try and cut a lot of weight, but rather dedicated themselves to a year-round regimen and stayed in shape. Personally, I think that boxing would have a crazy amount of talent between super-middleweight and light-middleweight--not to mention a lot of interesting fights. What do you all think?