He's going to have to make trades because the free agent class isn't deep. They have the payroll flexibility to get very creative though. They could absorb a bad contract for a better return.
I think it was gehringer who was pointing out Wentz only has about 8-10 mph difference between his pitches. Today he mixed in a lot more curveballs to give them another speed to worry about. Seems to have made a huge difference.