Hoopmaster, not sure how much you have watched practice or anything else from San Diego (Kemp's home town. Hmmmmmmm) this year. Maybe your child gave you reports......
However, if you take the time to watch practice, you would see what I am talking about. Kemp is a very good option QB, and a great runner. This is nothing against him. However, his throwing is #4 out of 4 QB's by a long way right now. IMO, Zapata is a much better passer.
That said, I have no idea if he can run the option. I have no idea if he is a good runner. He is very thin, so will have to put on some muscle to be more durable, no matter what he does. I have no idea if he can run the offense effectively. I was just talking about the passing. And in a passing competition, it wouldn't even be a contest. I think Zapata would win an accuracy contest over all 4 QB's on the roster right now.
I hope Kemp improves his passing to Zapata's level. I hope Zapata turns out to be as good of a runner as Kemp. That would be a nice problem to have.