Would Colorado-class battleships with Queen Elizabeth-class speed have changed their wartime use?
Short answerThey would be somewhat more useful and deployable, but 24-25 knots would still be too slow for carrier escort or a true fast battle line.
NotesA few extra knots would let the Colorados keep up with more formations and make them easier to employ. The change would not make them fast enough to support American carriers. Nor would it create a separate fast battle line. Their service might become busier, but their basic operational category would remain unchanged.