On one hand I wish they used the high school more. On the other, teen shows that do high school well (Buffy, Dawson) usually don't move on to college well because there is no reason for the people to still be together.
Buffy kept the gang mostly in tact and lost Xander to the background because he wasn't a college guy. Dawson sent Dawson off the LA for film school and then lost him from his ownshow because everyone else wound up in Boston or wherever. The only show that seemed to jump that hurdle is Glee that stayed in high school, but followed the main 3 afterward.
Assuming Diaries plans to take them beyond high school, at least we won't be longing for the school days because there never were any.
School didn't play a big role in the books either. Although the first few eps of season one focused a bit more on school life. I guess they decided to go another direction.