Vision amounts to being able to see a hole before it opens. Or seeing the backside cut blocks away from the direction the play is going in order to hit the cutback lanes specific to zoning up front. The ability to see these things at an elite level has never been coached. Either have it or you don't.
However, a back can be taught how to utilize better what he does see. The actual technique of reading blocks better. Become a smarter, more nuanced runner.
Staying tight to the hip of your blocker, pressing the hole before you bounce, more bent leg to make a cut, etc. Technique can be coached to make a back more consistent in the things he does do well.
A lot of the things Ballage does well are what gets you on the field in the NFL, catching passes and stoning blitzers to protect the quarterback.