A thicker or more strongly glassed board feels stiff and dead, in large part because it is more rigid. We have found that even a little more flex will improve performance in small weaker waves. We can tune that in with our composite core technology. When the waves get bigger, hollower, and more powerful, a conventional board is just too stiff. Think of flex as adjustable rocker.
Most shapers agree that rocker is crucial, and can make or break that magic board.
But most would also agree that different wave conditions call for different rocker. So we should have several boards in our quiver, possibly the same size, but with different rocker for different breaks. So the shaper must compromise, settling on the best overall rocker for the waves and style of the surfer. Fortunately, water is pretty squishy. The surfer can compensate for lack of rocker by pushing harder to make those tight turns.