I'm pretty sure Larry and others have posted data showing that everyone does NOT have attrition "like this". Jones' attrition has been high.
It would also be interesting if anyone had a quality of attrition measure. Regardless of the reason he left, Hurd is extremely talented and made strong contributions to the team. That's not like losing someone whose hope is to make the scout team. Same for P Wms and others.
Iirc, about half have been 4 stars or higher.