Part of me just wants to see a more talented player at first base, but if they make upgrades at a couple of the 2B/LF/RP holes then I'd be fine with Smoak and honestly, I'm kind of intrigued about how he would do in a full season at the Rogers Centre.
Also, it'll be nice to have a decent defensive 1B with the way Reyes' throws are spraying around at this point in his career. I think Donaldson is a bit of a loose cannon as well.
With Smoak's tiny salary, he's still highly mobile and even viable as a bench player.