I will take a late night stab...
If he goes up to the Cape and blows it up, pitches like he did at the end of the season...I know, a big if...but IF he does, he can change his draft position significantly.
And...If he doesn't, but has a good year next year, he still has leverage.
I don't know his circumstances with school and what not, but if he were my son, I'd say wait another year.
If and buts...but, can't disagree with the optimistic point of view. Guess, the option is nice,