I think you hit the nail on the head. The pitching is a huge X-factor. I think having a full offseason to just rest and get ready as opposed to rehabbing will do him wonders, along with having a normal Major League spring training routine instead of playing catch up with minor league rehab starts. We'll have a full year of Heaney, Skaggs has had a ton of time to recover from his surgery, can't wait to let him continue to develop. CJ will be healthy (hopefully). I think Weaver and Shoemaker will be better than last year, even if it's a slight improvement. I think the rotation will easily be able to duplicate the 2014 staff. My one real big question is the bullpen. Remember how strong it was down the stretch? After the Frieri for Grilli flip, picking up Street, Jepsen seemed to have really turned a corner, Morin emerged as a stud, even Rasmus and Salas were really solid. Then pen heading into 2016 is nowhere near as deep or strong as that group. I think Morin will bounce-back, but I have some serious questions about the bullpen. I think they need to make a move before the season starts, and even then, I think they'll need to make a move during the season (much like the boost the Grilli trade provided).
Left field will get addressed (whether it's Cespedes, Upton, Gordon, Span, etc.), I think they still want to make a move for a second baseman (they could flip a starter for one), but the pen should be the very next focus. I'd even argue it's more of an issue than second base. Just trying to guess along with the Halos FO.