An interesting thought is to build with lightweight shafts and doing grip-end weighting. That can give a lower MOI, but higher total weight club. Could give both more to work with early in the swing (pulling down the weight) and easier to release (less MOI). Maybe this gives a higher ballflight and higher speed? Or the other way around, a heavier shaft or added weight in the clubhead + a lightweight grip. Maybe this gives a lower ballflight and later release… just a thought.