I'm picking your quote here to chime in on, but my statement applies to other posters here as well.
Arch was inserted into a very intense game cold without having repped with the ones as the game's presumed starter. OK, such is the life of the backup. And obviously, he is a work in progress. But you cannot say with certainty that he would have played the rest of the game exactly as his first few possessions leading into halftime had Sark chosen to keep him in the game coming out of it. That is pure speculation being asserted by many of you. He may well have adjusted, settled in and found his sea legs so to speak. Or possibly not. But don't pretend like it's a given that he wouldn't of and possibly made a better game of it. He's a competitor, Sark would have been coaching him and his ability to extend plays are pluses that can't be so easily discounted.