Swing Changes Could = Club fitting Needs

Many golfers work hard at improving their swing dynamics. When swing changes are made it can make the fitting set up of current clubs out of sync. Example, I recently observed a golfer go through a swing change to get the weight shift and use of the power of the lower body into the swing.
This resulted in a better swing but a lower body position at contact from getting the lower body into the swing. This resulted into a number of fat or heavy hits and chunked shots. In this case, perhaps adding a bit more bounce to the Irons or slighly shorter club length might be justified,