An infielder doesn’t have to make 100 throws in a game for a 10mph deficit versus average to cost him more outs with late throws than an average infielder would yield over the course of a season.
One thing I would like Statcast to start tracking is accuracy of infield throws. Establish a “strike zone” for throws to first, a zone within which a first basemen can comfortably reach for a throw, versus having to stretch too far left or right, or leap way up, or have to come off the bag. Also, throws that make it all the way to first base in the air, or that bounce far enough in front of first so the ball is caught at a comfortable height, versus balls that bounce right at the feet of the first baseman. I assume they’re actively figuring that out, or maybe they already have and just don’t share it publicly at the moment.
Statcast could also measure how far in front of the bag a first baseman catches the throw. The longer he stretches, the more inches he shaves off the throw distance, the quicker he catches the ball, the more OAA made during the season. I gotta believe they are working on that one, too.