Fair enough. I don't think you're 'handing him' away. You're clearing some salary and bringing in a power bat to play DH, while freeing up the roster from a virtually useless Masa and Casas.
It'll never happen, and I'm not even sure it should, but as much as I like Duran - he's 4th outfielder right now and will stay that way unless something happens. Which is fine in itself, not many, if any teams have that sort of cover, but Harper isn't nothing, and brings an element this team badly misses - power.
Regardless, it doesn't feel like a Brez move. I was mostly just mostly putting it down to stress test it in my mind.