No matter how many FA bats you sign, if you are basically dumpster-diving for starting pitching, you are not seriously trying to contend. Even if Stras and Corbin rebound to 2019 levels, you are still short a top-tier #3. And you won't get very far in the postseason with a 2-man rotation.
Maybe Gray will be a high-quality starter, but I don't think we can expect 30 starts and 160-170 innings.