I believe if you take a look at the 2016 schedule, you will see the same amount of Saturday vintage shows, or only one more added in Sept.
You may feel there are to many on the schedule, other's like to see the old timers race. Saturday night events are much easier on the old guys to race.
Let them have their fun. It's not costing anymore $$ to see them, and they don't take up that much time.