Hill NEVER looked like he was the starter in comparison to Winston it was all semantics. Siemian entered the game and executed the offense something we've seen Hill do before but Siemian showed touch and an ability to find a passing window and though only one game appeared to scan the field and get and find his second, third and even fourth reads.
This offense does not need a super star quarterback to win, just a heady player with a natural natural feel for the passing game.
There are some aspects (not a shot against Winston) of Seimians game that made the offense flow naturally with his touch and pocket presence that makes people want to see more of him.
He gets the ball in the playmakers hands and that's really what Payton wants from his quarterbacks