You can be getting the pain in the ball the foot from several things.
1. Too much forward lean on your highbacks. If you have forward lean cranked on this can force the foot forward onto the ball. Back the highback right off and have it set so it only just touches the boot and see how that goes.
2. Your bindings are too narrow and are applying pressure to the sides of the boot/sole which can squeeze the foot and cause pain in the ball of the foot.
3. You have the toe strap done up too tight. Believe it or not but the toe strap does very little in the scheme of things. On toe side turns the turn is made with pressure of the toe pushing down on the board. On heel side turns it is not the toe lifting that makes the turn but the pressure applied by the back of the leg against the highback. Loosen off the toe strap a little and see how it goes.
Just remember though that sometimes when your feet have been cramped and in pain it takes a while for the effect to dissipate after you make the necessary adjustments. I know from personal experience that I had to get out of my bindings and loosen off my boot to get the blood flowing.
4. Your boots are over tightened or too narrow. Loosen your boots or go for a wide fit boot.
Thats the only suggestions I can make. I hope one of them helps.