If you say your wear pattern is more on the ball of your foot, my guess is you are not letting your ankle relax down so that the full foot makes contact with the ground in the load phase. That will cause your calves to engage, and that can lead to shin splints. Try shortening your stride length a bit and focus on the ankle ‘releasing’ like a well-oiled hinge, letting your heel make contact (last, not first). My right heel tends not to ‘kiss’ the ground as much as my left, so I sometimes drive it down (and back) just a little, before the lift.
See how that goes and keep us posted!
Certified Chi Running and Chi Walking Instructor