This. The playcaller could tell, maybe, that plays that took a long time to develop were a risk in this game; you need to test it but relying on what isn't working? . He got a few "long" plays off plays off, but what was his longest completion? How many for the game went for over 15 yards, much less 20? I don't know offhand, but it seemed like the chunk plays weren't there.
As for his elbow, it seemed fine in practice. There is this, though, he took a pouinding in that game and could have come up with an "owie" or two that afected his throwing. If so, we'll never hear about it. This is Stafford. He's played banged up his whole career.