That is all well and good in theory, but saying that a harsh scoreline eventually leads to improvement is assuming there is a competent coach in place and we all know that is not the case at each and every school. Also, a team can learn as much as it wants, but if the other school has all premier level club players and the team getting pounded has guys that only play soccer in high school season, there will never be any change in that scoreline. How is that good for development? How is playing obviously inferior talent good for development?
However on the other hand, what if a team is really good, gets "promoted" to a higher league, then all their best players graduate. I think questions do need to be asked about our current system.
Lastly, how anyone can support a 2 man ref team is beyond me. It is unfair to every single affected individual from the players to the refs. It's not fair to a defense that holds a great line to let an offside goal stand because the ref could not catch it. It's not fair to that ref to be yelled at because he could not catch it. Refs are humans, so they will always miss stuff but with 3 refs it really is much easier to consistently see everything. Each ref may have different interpretations but at least everything is seen.