A complete rebuild of the offense is not the answer. Did that this year, 9 new starters on opening day vs last year. Turn everything over and you're back to the same place you were at the start of this year.
I'd look at keeping Brown, Barnes and Havenstein for sure on OL, All have played well for most of season and have shown promise for the future. Saffold and Robinson are the questions on the OL, Saffold for the recurring health concerns and salary he'd get. Definitely need to have someone in to push Robinson at LT, if anyone ever needed a fire lit under him and needs to learn and put into practice what it takes to be a pro, it's him. Robinson's contract makes it difficult to cut him, so the move to guard is a possibility, if Wichman or someone else doesn't beat him out. Reynolds is a good keep, he's proven his value playing both guard positions as well as RT. Donnall and Williams both show promise and would provide good back-up potential, and have a wildcard in Battle. Above all have continuity from training camp on, not naming a starting center even though the outcome was known just doesn't make any sense.
Obviously Gurley is the man at RB for hopefully several seasons to come. After that, I'm looking at getting a good #2. Mason has definitely taken a step backward this season and missing a team plane shows a serious lack of judgement. I like Cunningham as a #3.
WR is an area in need of an upgrade. You've got Austin to begin with, but after him all are disappointments. I'd almost make this area the top priority to address in the off season. Britt and Quick are both disappointments for and production on the decline. Bailey cannot be depended on, a pair of 4 game suspensions puts his future in real jeopardy. Marquez shows promise and would like to see him get more targets the rest of the season to see what we've got in him.
TE - Keep Kendricks and Harkey and look for a top FA or use high draft pick to upgrade position. Getting woeful overall production this season.
QB - the tough one and a position that half the teams in the NFL are battling. Don't think the overall level of QB play has ever been as bad as it is now in the NFL. A lot of times it becomes; if you don't like you're QB, who are you going to get that's better? A top echelon QB rarely hits the market, they're like gold and you do whatever it takes to keep one once you have one. The easy thing to do is say move on from Foles and give Keenum or Mannion a chance or draft someone. This league is littered with QBs that looked good on paper or carrying a clipboard but failed once the bright lights hit. The recent NFL landscape is littered with former #1's that couldn't or are not cutting it. Just heard on SNF that Peyton wants to play another year next season. Is one year of Peyton what we want?