These buses wouldn't have to run that often. 30 minutes during peak hours and 45-60 minutes off peak would be fine. I'm specifically talking about serving South County more. Bring back the Line 15, make the 16 go to the Morgan Hill Caltrain, and add another Line that serves areas of Morgan Hill not served by the 15 and 16 and can also serve San Martin.
Also, Monte Sereno currently isn't served by VTA. Many of the people who live in the more suburban towns on the outskirts of the county don't ride VTA because the service isn't good in their area.