You are missing the point that the difference in drop-off between parties is irrelevant. TOTAL (i.e. party-independent) drop-off numbers averaged 0.99% which was less than the margin of victory. When you have around 1/3rd of voters being unaffiliated and many of them voting mixed candidates across parties, you can easily have "drop-off" between parties by having people vote one party for President and a different party for Senator. Again, comparing drop-off between parties is a nearly meaningless statistic.
You are missing the point that the difference in drop-off between parties is irrelevant. TOTAL (i.e. party-independent) drop-off numbers averaged 0.99% which was less than the margin of victory. When you have around 1/3rd of voters being unaffiliated and many of them voting mixed candidates across parties, you can easily have "drop-off" between parties by having people vote one party for President and a different party for Senator. Again, comparing drop-off between parties is a nearly meaningless statistic.