My highest scorer, Grijalba, ranks #31 in the United States for Field Goal Percentage (#3 in all of division II), and has atrocious Driving, atrocious Handling. I'm not sure what that means but it certainly isn't a desperate requirement to have good handling/driving.
Same here, I own # 11 Germany for FG% and he has driving level 1...
But he is only # 604 for pts/48min.
Therefore (and salarywise) I am considering to add some driving. I would thus be very interested to understand if more driving leads to more points. It should.