My information from testing we conducted at Titleist almost 20 years ago was that swing weight had no affect on ball flight. It is strictly a feel preference of the player.  If the shorter length shaft made it easier for you to hit the ball on center then that is worth any trade off otherwise -- swing weight, shaft characteristics..... on center hits go longer,have less spin, less mis-direction, enables the head of the club to perform the way it was designed. 
  If you want to try another before you cut yours off find a good Titleist fitter and see if he will let you use one of his 3 metal shafts that range from 42-43" length. Put it in your driver and hit it.

steve ball
Titleist club fitting consultant