The only way they're going to get a pitcher better than Nola is for one of the young arms in the system to develop.
What they could get in a trade or FA is a #2/#3 type to go with Nola at the front of the rotation.
Lively, a healthy Eickhoff and maybe Thompson if he keeps improving would be a decent back of the rotation, Velasquez would be nice but I'm not holding my breath.
The key is to build a 5 man group that can provide quality starts on a regular basis.
This saves your bullpen and keeps you in games, which not only helps to garner wins, but for a rebuilding team, putting young players in competitive situations for evaluation.
Then you look to upgrade over time. Develop a Sanchez or Kilome and you move 2-3 pitchers down the food chain.
Lively is a strong boy, he was hitting 93-95 in the 8th inning, the hardest he threw all day.
Just has to sharpen that breaking ball, it has good break but he was leaving too many high in the K-zone and got burnt on a couple.