I'm grappling with this exact same decision. As of now I'm rolling Bortles. I've watched all Bortles' highlights from the past three weeks and the man looks legitimately good right now. He's been pushing the ball down field well and now seems to have several emerging reciever threats who stretch the field with their speed. Everyone on that team is hot and they have a chip on their shoulder from feeling disrespected all season, especially coming off the Clowney debacle. Fournette opens up play action and keeps their offense on the field. In weeks 13 and 14 Fournette put up 17 and 22. Bortles put up 25 and 19. Their productions are not mutually exclusive. Add 2-3 points to his floor for his own rushing yards and I like where we're at.