Jones recruited at least one QB on our current roster to Cincy. Jones also recruited Dobbs directly to UT.
Jones' forte' is offense. He prefers a species of the spread and/or read-option. I am not proficient enough to tell you what makes his philosophy specifically different than the version that Malzahn or Kelly runs, but he is much closer to them than say, Saban.
I believe that you are making an incorrect assumption on attrition. Even if attrition was exactly proportionate for both UT and Auburn, Auburn's last classes are far superior to UT's. This means simply that if you distill either UT or Auburn's rosters down, Auburn's would still be far superior. In fact, Auburn's roster, in my view, is good enough to win the east outright and compete for the west.
The second incorrect assumption that I believe you are making is in relation to the importance of the QB. I am not saying that a QB isn't important, just that we believe them to be more important than they are. I have read some interesting numerical studies that suggest that the most important position on the team is a kicker. That a good/experienced kicker accounts for over a one game a year difference in seasonal outcomes versus a .2 game a year difference that a good/experienced QB accounts for. I am not saying that those are definitive studies, but they are intriguing.
More than intriguing, it is consistent data with teams who have a system quarterback that is attributed as winning the national championship (Newton/Tebow) you find that their whole rosters were superior to their competition. That fact negates a bit of the support for the idea of their singular impact.