Manning was a huge part of that Super Bowl win and you saw why last night. The offense was terrible in the SB, but Manning holds people accountable and demands the best out of them. If a lineman misses an assignment, he screams at them. He commanded respect, got it, and the offense did just enough to win. That's why he is regarded as one of the best field generals in NFL history. Siemian isn't a vocal leader and that's why he won't keep the job much longer. Siemian doesn't demand respect. He doesn't have the ego required to be a successful starting QB. When things go south, he just gives a goofy look, hangs his head, and walks off the field. He'll be replaced this offseason.