Would the United States need faster Lexingtons to compensate for its slow battle line?
Short answerNo; Lexington was intended to scout and hunt cruisers while the concentrated battleship force closed for a decisive action.
NotesThe American plan did not require Lexington to compensate for battleship speed by joining the line. Its fast ships would find and shadow the enemy, while the battlefleet imposed a choice between retreat and a heavily armoured gun action; the weakness appeared if political demands forced that concentrated fleet to divide.