I got this one.
Offensive line and injuries. We lost a pair of senior O Linemen from last year, including one who was a first round draft pick. We would have likely been fine, but during the Auburn game they crippled two of our starters and, as we found out like seven weeks later, our QB too. So we were down to several freshmen on the offensive line and had a QB (who is still an average passer at best) playing with broken ribs.
Last season we played relatively injury free and the ball bounced in our favor a few times. This year, we got our toughest opponents at home, so homefield did not matter much, while we got some of the easier ones on the road (if you can call many games in the SEC West easy) where is was enough to tip the scales in their favor (see Auburn).
I personally believe this years team is the same as last years, minus some good luck.
In regards to Coach34, I have seen thousands of his posts on sixpackspeak and tigerdroppings (as Coonassbulldog). I can assure you that he is 90% for real and only 10% trolling. However, the guy does know college football and is usually at the very least in the ballpark on his posts. He is, obviously, an unapologetic dick, which is perfect because unless its a really long running joke, his profession is condom salesman. He will make this board fun for you in the coming weeks.