Smothers is probably the best runner of the bunch. In the old days, you'd see a guy like that switch over to RB or maybe WR. In today's game, they usually transfer elsewhere. There were a few times we had both Adrian Martinez and Luke McCaffrey on the field as a sort of RB/WR/QB hybrid and it was pretty electric.
If Smothers isn't the guy, I'd love to see him get onto the field in situational play. There's absolutely opportunity to leverage a guy with his talents, especially if their heart is in it. Rex Burkhead was a high school QB who adapted in college. He wasn't the fastest or strongest RB, but he played with heart and wound up winning a Super Bowl as a running back for the Patriots.
A lot of young kids want to be the signal caller. But guys like Burkhead usually wind up having the better career as they're able to eat some humble pie and do whatever it takes to help the team win. I'm hoping Smothers can be that guy but I won't be surprised if he transfers (assuming other NU QBs surpass him).