Seems like everything has pretty much been covered here...I'll post my thoughts nonetheless:
1. I don't mind that we schedule Navy every year. I don't recall hearing any such complaints when ND hung 50 on them versus just 10 scored by the Midshipmen in 2012.
2. The end of the game when Navy was forced to pass and play outside their normal rhythm? ND bottled them up. This is how you beat Navy - put them behind by several touchdowns and force them to abandon the grind it out run game. ND was about to do this at the end of the first half, and failed to capitalize when Golson threw the pick. That one play changed everything for the duration of the game, but don't lose perspective on the fact that ND was one play away from putting Navy into hurry up mode for the entire second half, which would have gone very differently if that were the case.
3. Navy could not stop ND's offense. The only thing that stopped ND's offense was conservative play calling and poor decisions on the field.
4. In the 1980's and 1990's, ND could rely on at least a few of their players having seen the option rushing attack at the high school level. There's likely not a player on the roster today who encountered that style of offense before coming to ND. This may be as much of a factor as any perceived deficiencies at the DC position.
5. ND has already exceeded expectations for the season. Does it hurt to think that after many fans adjusted their expectations upward, we might not make the playoffs and win a national championship this year? Sure it does. But given the youth of this team and the foundation that Kelly has built and continues to build, the future looks very bright. Some fans seem to forget that it's been quite some time since ND was still being discussed as a championship contender after 8 games of the season - BK has put us in that position 2 of the last 3 years. Perspective, folks.
6. ND was not the only top 10 team who struggled to beat an opponent this weekend. Do our fans think that the voters are more sympathetic to close calls for everyone BUT ND? ND has one of the toughest remaining schedules of any team in college football. Winning out will take care of such concerns. Stumbling into one or two more losses will only confirm those concerns. Either way, ND is still largely in control of its own destiny. The only playoff vote that matters is the final vote, and by then we'll know whether or not ND deserves a spot.