Overall, I'm a little disappointed with Simmons. He is a fine defensive player, but he has made miscues at the worst possible moment. On a pennant contender, he can be an asset and most likely a pennant contender will lose their shortstop so I would think he will be in demand by the trade deadline.
It would be excellent if the Twins had a plus defender at shortstop who can contribute offensively. I doubt that is anybody we've seen with the major league club, including Polanco and Gordon. I haven't been much impressed with Arraez as a utility guy, but I feel like what he has to offer at the plate is exactly what the team needs. Perhaps Gordon could be a real utility guy and he might offer a bit of speed, which is something the team lacks.
Getting back to Simmons, there's really no future for him, but showcasing him before trading him does make sense. He's very good in the field and a bottom of the order hitter. Someone will probably need a player like that .