Assuming the span is correct, if you are dragging at the release...try minimum changes as to know what to gauge any further changes on.
Leaving the reverse, change the lateral to 0 lateral pitch...throw and see if it lessens. Go from there.
Lateral pitch tends to effect how much the hand rotates around the ball before the thumb exits and reverse/forward tend to effect on the downswing as well as effecting gripping or aqueezing.
--------------------
Formerly BrunsRico