Instead of scoring 125% for a successfully landed flight, how about an addition instead? That is if your perk score is X, and X > 0, then if you successfully land, you get a bonus of Y. Y should only be 1 or 2, perhaps depending on ENY value. Say Y=+1 if ENY <=20, +2 if ENY > 20? Perhaps this is too stingy?
This would not benefit the better players significantly since 1 or 2 points would be the same or less than the +25% they would have otherwise have got, but would benefit newer players significantly, since 125% of a lot less than 1 perk point is still a lot less than 1, but +1 or +2 is a vast difference.