We know how this all ends. Dak can be good, yes I said good, at backyard football. No planning, fire from the hip, chaotic football. However, when he plays good teams, that type of play doesn't work, it's not sustainable, and his weaknesses shine through. No planning, low accuracy, short field of vision, etc.
The cowboys have known this for years. His best consistent play comes from regulated systems and moderation. They will probably turn him loose this year in what they are calling a Dak friendly system. He will either feast or famine.
I predict he will do much of the same as last year. Have some great games, have some terrible games, and at the end shown no growth, and lose either at the end of the season or one in done.