What part isnt true?
How many 50+ yard plays have they given up to how many teams?
Are you really trying to tell me tackling on the back end hasnt been a huge problem?
This all completely depends on the play that the DC calls up. With SEC offenses as fast as they are... no Safety has the catch-up speed to compensate for a horrible call.
Take a unit with no confidence in itself and the coaching staff and you have the 2012 UT defense.
I'd say the biggest problem was setting the edge which isn't always the responsibility of the safeties. Also, our corner's couldn't tackle a tackling dummy. Moore having 86 tackles last year implies to me that his tackling probably wasn't the issue on all those big plays.