If they had signed Bautista, it would really make all the sense in the world to start easing him into more DH or 1B starts and give OF start to Pompey (or even Ceciliani). With Jose only hear for one year though, I don't know if they risk disrupting him for something that's not a long term thing.
On the other hand, if you assume that the front office already has something like this in mind, it would explain why they didn't invest any real money into 1B.