Where American standard battleships could free British ships

Could surviving American standard battleships enter the Mediterranean and free British capital ships for the Far East?

The proposed relief belongs mainly in Atlantic and Arctic convoy escort, since the American standards are considered too slow for the Mediterranean role.

The proposal initially sends surviving American standard battleships into the Mediterranean to release British ships. Their speed makes that substitution unattractive. The British ships being discussed in the Mediterranean are modernized Queen Elizabeth-class battleships, while the R class belongs to the Eastern Fleet in this argument. Assigning the American ships to convoy escort would instead release British fast capital ships from northern commitments. The counterfactual therefore depends on exchanging suitable duties as well as counting available hulls.