I don't think telling high school students to train more is a simple answer. College tennis is MUCH more competitive than high school tennis. I know you want the college format to make high school tennis more competitive and exciting, but the problem is that high school sports is just that - a high school sport.
This goes with my point that there are usually only two lesson kids and the rest being casual players. The lesson kids are competitive to begin with, while the rest usually just play because tennis is fun. College, however (talking only division 1,2, and 3 - not junior college), is filled to the brim with lesson kids. You can't make the team without having gotten lessons at some point in your life.
The players are just too different as far as background and ability, which is why I like the separate formats for high school and college.
I am an unpredictable player. Even I surprise myself with some of the shots I make.