They finished #43 in Strength of Record. 15 spots behind Miami. But ahead of Texas, NC State and SMU
#38 in NET, 26 spots ahead of Miami.
#41 in Torvik, 45 spots ahead of Miami.
#38 in KenPom, 55 spots ahead of Miami.
Auburn was also undefeated against rotting corpses (6-0 in Q4) as were Texas (7-0), and SMU (6-0) but NCST did have a Q4 loss (4-1) as did Miami (15-1).
Also note that all 33 of Auburn's games actually count in NET as they are 17-16. The same is true for SMU (20-13) and NCST (20-13). Texas does have one game so bad that it doesn't even count in NET while Miami has not one but two.
The committee has shown us all that they are either unwilling (too lazy) or unable (too stupid) to evaluate quality of opposition so now ALL schools have been put on notice that Bill Snyder was right, NEVER SCHEDULE A LOSS.
For Auburn, playing Michigan, Arizona, Houston, and Purdue was fatal to the NCAAT hopes.
The problem is that, as always, you will get more of what you reward and less of what you punish. The committee has rewarded crap scheduling and punished tough scheduling.