My span is 5 1/16 mf and 5 1/8 rf finger does 5/16 rev no lateral in the thumb seems to be about right for the thumb.

As a starting point, strictly by the books, it's not enough reverse (and probably should have some left lateral - assuming you are rt handed).  However, there are many factors to consider when determining pitches.  One of the most critical being whether the current feels comfortable and comes off your hand cleanly.

The proper angle is not merely predicated by either reverse or lateral pitch, it the combination of the two increasing the necessary and correct release speed

Then the angle of the hole is hindering it from releasing when it should or by allowing gravity & momentum to take over

No problem.  It's just an angle.

You must fit dynamically!

Regards,

Luckylefty

There has been a lot of changes in recent years on what is considered proper thumb pitch.  I has stemmed from the fact that many of us have found that reverse pitch on the fingers is very helpful in clearing the ball without grabbing.  When you go with reverse on the fingers you will find that less reverse thumb pitch, or even forward pitch, will help you relax your grip and further keep your from grabbing.  Also it depends a lot on the flexibility of your thumb 

I was re-fitted over the weekend one pro shop suggested that change my span to (5 1/8 and 5 1/4 and use 3/8 rev in the thumb another shop said use zero or forward thumb pitch with 3/4 rev in the fingers both agreed on the finger pitches.Original span is 5 1/16 to 5 3/16.

The options can be endless.  I have a local shop that doesnt believe in using side pitches on the thumb.