Through the years I tested and owned a wide variety of bows of different lengths. I have never experienced finger pinch regradless of the A-A length. I once had a little bitty Mathews that I shot quite a bit. Never had a problem. Could be because I often shot two fingers instead of three.
I tend believe that many of the problems people have is due to a preconceived idea that they are supposed to have a problem.
Once, when my luggage was lost in the Montreal airport, I arrived in bear camp with no bow. I just borrowed the outfitter's Hoyt, set the bottom pin at 20-yards, shot it about a dozen times and went hunting. Seemed to work well for me because I assumed it would work well.