Heres my little list, no order.
Less drops
Cut down on penalties
Better accuracy(and less INT's)
Young and/or Bundrage stepping up opposite Lenz
Howard and/or Brun stepping up at TE
Establishing the run early and often, don't get away from whats working
Improved pass rush
Most of those things are on offense, and I think it is all very possible to accomplish with the talent and experience returning.
Less drops
Cut down on penalties
Better accuracy(and less INT's)
Young and/or Bundrage stepping up opposite Lenz
Howard and/or Brun stepping up at TE
Establishing the run early and often, don't get away from whats working
Improved pass rush
Most of those things are on offense, and I think it is all very possible to accomplish with the talent and experience returning.