The lack of an immediate return to combat did not necessarily mean Savannah was permanently weakened. As a training ship, she could send prepared personnel to other vessels while regenerating her own crew. Keeping a capable rebuilt cruiser in reserve also gave the navy a replacement if a front-line ship was sunk, damaged, or withdrawn for repair. Since the fleet had enough other cruisers, it could test whether Savannah's extensive reconstruction was holding before operational necessity forced her back into combat.
Notable Point · 5:48-8:31
Why rebuilt Savannah was held from immediate combat
Savannah's post-rebuild employment illustrates crew regeneration, reserve capacity, and the need to prove a heavily reconstructed hull.