Not to defend Franklin at all, but there's a lot of speculation about that last play call.
Basically, as fans we simply don't know what happened.
It's possible that McSorley simply made the wrong read on a read-option. If you watch the play, at the mesh point, a defensive lineman was almost right on top of him to his left, which, in a read-option, generally means that the DE didn't crash down the LOS. If that's the case, then the correct "call" is to go ahead with the handoff. If the DE crashes down, you keep the ball and either roll out to that side or drop back in the pocket.
The problem is, OSU ran a stunt, and brought Young to the inside (from the other side). Watch the play in slo mo. The OL didn't pick up the stunt well at all. The center should have picked up Young, but he went to the second level and picked up a LB. The LG picked up ..... nobody. The execution was terrible. OSU was expecting pass, and got lucky with the stunt and the (possible) misread on the option.
It's possible that Franklin is simply taking an arrow here, so as to avoid heat on McSorley. We'll probably never know.