I think the racing series cars should have wings. Mainly because of the look it provides on the cars. I don't know how much downforce the wings on the current car produce, but they enhance the overall experience in my opinion. It is more fun to be in a car that more closely resembles those that professional drivers race. Also drivers who are using the series as a stepping stone will be more likely to want to participtae if the cars are similar to those they will use later in their careers.
I don't think the wings should be adjustable though. The time that would be spent on adjusting wings would slow the entire process down. Each car would have to be rest between groups, then you'd have to remember the exact settinsg that you had on your car. It would make for 60 minutes turn around times!
