I don't see what the issue would be with having Miggy, LaRoche, and Cuddyer all on the roster. Miggy plays 1B, LaRoche and Cuddyer share DH and bench bat roles. LaRoche can back up Miggy at 1B (as can Cuddyer), and Cuddyer can play 3B or corner OF in a pinch. With Davis to backup all 3 OF positions, McCann to backup/platoon with Avila, and Romine (or someone else) to backup 3B, SS, and 2B, its not like Cuddyer/LaRoche would be taking up an extra bench spot. And we'd FINALLY have a goddamn bench bat, the first useful one since Thames.
With 13 position players, here's how the roster would shape up:
1B: Miggy
2B: Kinsler
SS: Iggy
3B: Castellanos
RF or LF: JDMart
RF or LF: LHH OF to be named
CF: defensive wizard to be named
C: Avila
DH: LaRoche/Cuddyer
Bench:
LaRoche/Cuddyer
Davis
Romine
McCann
I fail to see any big issues with this if we don't resign VMart.