I just don't buy that the HR derby can really mess up a good ML swing for more than maybe a week or 2. And that's a stretch.
I think Cespedes is actually a solid choice, he loves to swing hard, could be exciting in the derby. I'd have liked to see Giancarlo Stanton make the NL team. Sure, he's hitting like dogshit this year. But man, he can pound the ball.