I can guarantee they aren't scripted. I'm in an Online Dynasty and all of us started with the exact created school. (Same players, same stats, the only difference is the team uniforms and the random names gave us all different names. Oh and of course we have slightly different depth charts.)
Our team has a power back sophmore and a speed back freshman. Since I prefer the power running game (I use lots of short 2-3 yard runs to lure the defense in, then hit long patterns) and my buddy prefers the speed running game (He likes to use options and end-arounds for his running) we each gave the majority of time to different backs.
As well, I use a spread style where I put the ball in the hands of all my WR. Whereas he tends to focus on his top WR.
Come the end of the year, I have no transfers. But his power back and his #3 WR both transfer and he can't stop them.
We both commented that it made perfect sense. On my team, I was giving the majority snaps to the more senior player and everyone was ok with that. But on his team, the sophomore HB was being ignored for this freshman. Of course he's going to assume he's never going to get to start, and of course he'll look for a transfer to a team he can start on. And his #3 WR had like 3 catches all season, so of course he's looking to transfer.