As it currently stands, everyone in the line up is returning, sans Navarro. If everything remains the same, it actually will be improved with Travis over Goins. The only thing they could probably use is a strong left handed bat, most here want Heyward. That would let them move Bautista to 1B/DH.
The question comes down to what Shapiro's plan is for the rotation, will the FA market satisfy him? Even though JB and EE are 10/5 players, would he able to move one? Should Tulo be moved? Who's the back up catcher?
Can they repeat last year? Yes, they could actually improve on the record with the right plan, but the rotation is incomplete and we'll see what Shapiro/LaCava has in store, likely 2 mid tier starters. I think they should offer Estrada a QO, its really not the worse thing if he accepts like so many think and the odds are they get a free draft pick anyway.