You really think they thought he was good at 2B defense and were surprised?
Let me spell it out for you: They knew he was bad, but they've gone with bad before. They hoped his offense would overshadow the bad D, and maybe (just maybe) he was actually worse on D than they thought.
We all know the offense never made up for jack.
IMO, his best spot might be DH, but he may become passable in LF, but we have 4 OF'ers plus Masa, so he's squeezed. Of course, there is no squeeze, unless he starts hitting and puts pressure on deserving another look-see. That may or may not ever happen.
My point was they knew he was bad and that was precisely why the shuffled him around so much, which is why I said "huh?" to this statement:
If they knew he'd be that bad, they wouldn't have shuffled him around as much as they did.