I think part of the problem for mid-PS pilots is that you're paying for both PS and an ability. Unless it's one he'll of a powerful ability (which tend to be on high PS pilots), you're wasting the points on PS when it's above 2 and not high enough to PS race with the aces.
One idea might be to cost PS on a non-linear scale; keep the aces at the same points total, but lower the costs of mid-skill pilots across the board from now on by 1 or 2 points. Also, I feel that except in special exceptions, all named pilots should have an EPT slot.