Way I look at this one, is if he's a 4.5 ERA guy as some project, he's a #5 and can be pushed aside if there's a hot shot not in the rotation (Cavalli, Lord, Lara). Maybe doesn't even preclude another vet signing. IF he's better, fantastic, and if he's worse, then just hope they will pull the plug.
If he's good, he'll be a Guardian, Giant, Phillie, etc by the deadline. If he's bad and healthy, Corbin 2.0. If he's bad and gets hurt, he's Gallo 2.0. Lara probably needs a stint in AAA before a callup, so if Soroka has any takers at the deadline, Lara could take his spot then.