I imagine that Rocco only wants to play him in one of the games, which seems reasonable. It's almost like Rocco used a lighter hitting lineup for the first game backing his ace and intends to go with the better lineup in the second game. I can see the logic in that, but I'm not sure I like it.
Yeah, it's well past time to drop him in the order. Arraez should be at or near the top, not the bottom. There's no reason that Polanco should be hitting at the heart of the order. He's not slumping, this is closer to who he is.