In most small schools, you are utilizing every kid on the team, especially in your 8 man example. You could argue some kids could wrestle their natural weight class and not have to bump but I personally don't believe that will make or break a kid's decision to stick with wrestling. I could be wrong...
I never said anything about good programs getting better. My point was the 15/13 will be utilized most by the larger programs as they have the numbers readily available to fill those two spots. I don't argue your point about keeping kids out in smaller programs, I just don't think it will move the needle in regard to forfeits. I would submit that most small schools are utilizing every kid on the roster to fill as many spots as possible. Sure, there may be some kids who are, "stuck," at a weight and can't go up to fill a forfeit and the 15/13 would solve that but I don't think that is the norm or the reason behind the influx of forfeits in small programs.
Again, I'm in favor of the 15/13 idea and I think it's a step in the right direction. Just not sold on it significantly decreasing the number of forfeits.