In order to have a good season these are all the variables that have to be considered:
Offense
1. Ainge stops overthrowing/underthrowing receivers
2. Replace 4 offensive lineman and get them to play as a unit
3. WR's have to stop dropping passes
4. Find a fullback who can block, CATCH, and NOT FUMBLE
Defense
1. Replace 3 linebackers
2. Replace 3 of 4 starting defensive lineman
3. Pass Defense has to get better, will not have the luxery of the no. 1 run defense/pass rush in the nation.
I think UT has some major personnel issues still on offense. It seems to me the best players off a 5-6 team graduated.
The only real bright spots are at RB position, and the Secondary. The defense does have a good group of young LB's, D-lineman coming up.
On offense most of the players that are responsible for their poor performance i.e. QB, WR, FB, are returning. Offensive line is a question mark.
Its hard to see this team losing less then 4 games IMO.