I think we need to differentiate between playing well and scoring well, as the two are not necessarily one and the same.

I will agree that there is more feedback in non-cavity designs. However, I fail to see how the level of feedback relates to ones' ability to play.

I will stand firm in stating that blades do NOT improve your ability to score. How can losing massive yardage on mishits help your score? The short answer is 'it can't.'