They should trade redundancy, but I think they need to decide long term what to do there. If Moncada is the answer, he needs extensive reps this offseason. Will he be ready for 3b opening day? Maybe not. Midseason call up for 2017?
In the meantime, they need to decide if they want to keep Hanley or Shaw. Hanley doesn't have the stick for DH. They will probably need to eat some of his contract and move him to the NL. If they keep Shaw, they'll need a platoon for him (i.e. someone not currently on the roster). Could Sam Travis be a 1b/DH with Travis Shaw?
Are they going to bring in an expensive bat like Encarnacion this offseason? I honestly don't think they will. I think they either look to keep Aaron Hill or bring in Brandon Moss rather than grab an Encarnacion.