The biggest issue for the Colts is that they are completely incapable of running the ball. They will break the occasional draw play but they go backwards when they just line up and try to run. Even their patented stretch play has effectively been scrapped because they can't block for it.
Manning is still the best timing passer I have ever seen. Not sure it is the safest gameplan to just ride Manning's arm exclusively. The defense looked quick and active but there were still big plays to be had (Smith just couldn't capitalize).
Of course none of the Colts' "weather" road games are in December. In fact, in the last 8 years the Colts have only played 2 outdoor games north of Baltimore after Thanksgiving...Buffalo last year and Denver in 2004. Both on the last week of the season and both not affecting the playoffs (Colts got crushed in both). No Pats, Jets, Giants, Packers, Browns, Bengals, Bears or Steelers in the cold. Amazing coincidence, isn't it?