Are you sure its a good thing to change a BIG fundamental just to help you hit your driver better? Its obviously a plane problem because you cut it but hit your
irons good, the reason for that is because an iron has more loft and doesent show up your bad swing habbits as much, they say a driver shows all your problems!
All you had to do was put a headcover to the right of the ball, and hit balls like that for a week, hitting the ball from an inside approach!
But grip change might be good for short term, but it will cause more problems in the long term.