This will be sacrilege to some here, but I thought Tolzien looked a lot better than Flynn did when coming off the bench cold. With time to prepare and having MM develop a game plan around him, I think he will be fine. Yes, he had a couple of really bad throws that resulted in picks, but considering he has been up on the active roster for 6 days and likely got few if any practice reps, I was really pleased with his performance.
No idea how anyone can say after this one game that he isn't capable of being an NFL QB.