My gut is I don't think he will ever develop into anything more than a backup type. I don't think he has the size, accuracy, or mentality to be a star. I have always said it, I hope I am wrong. Just my gut, I see deer in the headlights when he plays. I don't see someone comfortable in the pocket or reading defensive schemes.
With the weapons they have on offense, White or Flacco would be fine as their starter.