I was on the "Give Canario a chance" train last season. But here's my negatives for him if he's your best bench bat -
83 wRC+ projected overall. In the days off/injury/platoon scenarios that we've beat to death, is he the guy you want getting 300 ABs?
In the "got to have it" PH scenarios for Busch/PCA, is he the guy you want to PH knowing his quality of contact? Bases loaded, 1 out, tough lefty on the mound, need the ball put in play, etc
He's not a 1b
Why not roll with Turner/Canario/Berti/Kelly? You have 5 OFers then on the roster, and all positions covered with backups who can handle each position on the field. On top of that, you have a guy in JT who you feel ok with in the starting role when needed.