1. While Rueben would probably run it pretty well, Russell Shepard would run it better, and
2. Rueben is more valuable on the outside as a potential receiver in the wildcat.

I can envision an offense in which Jefferson is not in the game, with Sheppard and Randle alternating at quarterback, but I think there is such a thing as getting too cute. Practice time is limited and you have to make choices about how you spend your time. Every minute of practice time you use installing a specialty package is a minute you aren’t working on your base offense. At some point, you get diminishing returns in specializing and start losing a lot of ground on working out the kinks of your base offense.