If it's still in box finish, take it down to 1000-grit sanded. If it doesn't roll out (remember, the Phenom is a very strong high-load particle ball), it should at least be earlier and smoother.
The advantage to surface changes is that you can always undo it. A weighthole could be plugged, too, but now you've got a ball with a plug, and that's not necessarily as valuable. Same with plug and redrill (which may be a more serious change to the ball, but will make a much bigger difference).
SH