The midfoot cleat position may not solve your problem. I went mid foot for a year but eventually returned to the ball of the foot.
Midfoot resulted to less smooth pedaling and lower cadence and other issues. For a time, it felt easier due to more leg extension and easier on the ankles when standing on the pedals. But those advantages were only temporary as my ankles became stronger and more flexible, I was able to position at the ball of the foot just fine.