Outside of how a player changes their action to account for the shaft bending or deflecting too much there are many things that can occur as a result of a “soft” shaft or an incorrect shaft profile.
As a generalisation a player may experience:
and other issues that make it harder for you to make clean contact with the ball and transfer power from your swing into the ball.
Therefore, getting the right flex for your swing is a critical part of what we do. Also knowing more about each shaft and how you load it will mean a much more enjoyable game and a lower score.