Only a thought I had today, with seeing and talking to other managers in my league, all saying almost the same thing, with points on the main parts of the car being 100 and only the cooling and reliability being not at 100.
So my thought/suggestion is to keep the points rewards at the same level, but increase the limit of each part of the car from 100 to 150. That way the cars should be more different levels to each other, with a very unlikey event that any section will reach the max, and if so other elements will be greatly reduced.