I'm playing regular graphite shafts in my AP1s. Will stiff graphite in the same club reduce twisting, give me less dispersion and make my shots more accurate? I know I might lose some distance, but will I lose the height, too? Would a regular steel shaft be better for me? I've been told I have a smooth swing.
Assuming your swing is consistent, then your speed could cause those effects. A good Titleist fitter can check your swing and try a couple of options. The stiff version if it is the correct one for your speed won't decrease distance or loft - ast least not to the point of lower than optimal.
Even for average/lower swing speeds, there are lightweight metal shafts. The choice would be mostly personal. I liked a metal shaft better but I told the fitter I wanted them to last 6 years.. I was 61 at the time. He asked me the odds of increasing my swing speed as I got older. ,,,I went ahead with graphite (AD55?). Still love the stock metal shafts in my wedges.