It's all about pitching. I'd love to see Lester back, however; I'll not hold my breath. Use the extras (Nava, Middlebrooks, Mujica, Craig ...) and young players (De La Rosa, Workmen, Escobar, Marrero ...) to go after Sale, Hamels and/or Samardzija. Bring Miller back in the pen. Shields would be a two or three year "Cherington" contract and only after the Sox know whether Lester will be back and/or if Sale, Hamels and/or Samardzija are not available.
Trade & sign FA who are still young with potential ... Shields being the old man of the crew ... Buchholz & Kelly hold down 4 & 5 spots.
Plenty of solid young arms still in the system (Owens, Barnes, Johnson & Trey).
Pen built using Uehara, Wright, Wilson, Tazawa, Layne, Webster ...
Lineup fine with Castillo, Cespedes & Betts starting and Bradley with Victorino on the bench. Napoli, Pedroia, Bogaerts and Holt/Cecchini holding down the IF and Vazquez/Ross/Swihart doing the catching.
Again, solid, young, proven pitchers to bring the Sox back to solid contention.