It's pretty clear they need to acquire someone who can field shortstop at an MLB level because none of the players on the 40-man roster are good at it. That's the biggest hole on defense and it will keep this team from reaching the playoffs if it isn't solved. Even if everything else goes right, shortstop defense will kill this team's chances.
Austin Martin and Luke Keaschall are weirdly similar LF/2B players. I don't really care which one plays LF and which one plays 2B. With the current roster they need to find a way to get both of them in the lineup.
Brooks Lee fits best as a utility player off the bench, just like Kody Clemens.
They also need to add a first baseman who is a better player than Eddie Julien. That shouldn't be super difficult.