In the end there really aren't any AAA players to evaluate for this team's short-term needs. The relievers will continue to rotate and revolve in the one spot the MLB team has. And they will have some decisions to make about Painter and Abel in two months. But the line-up is the line-up, especially now that it has settled into a platoon (as has 2B). The only thing that would will make it better is an impact, non-platoon OF bat who could actually take over LF or RF.
I am not buying Crawford as an upgrade over Marsh or Rojas this year. If Kemp or Kennedy (neither of whom are even on the 40, nor is Crawford) show up someone got hurt. I could see Crawford eventually getting the call over Stevenson (much like Rojas did) if an OF got hurt.
Obviously the team is not a juggernaut (but neither are the other teams). The next five weeks will tell more of a tale for all of them.