Did the US Navy see its carriers as replacements for Lexington-class battlecruisers?
Short answerTo an extent: aircraft provided even greater scouting and striking speed than the battlecruisers the hulls were designed to become.
NotesThe Lexington-class battlecruisers had been designed around speed as a way to scout, concentrate, and influence a fleet action. Conversion replaced the ship's guns with aircraft whose reach and speed extended that function much farther. There is some continuity between the abandoned battlecruiser mission and the carriers that emerged from the hulls. The answer avoids claiming a complete one-for-one replacement while identifying the operational logic shared by the two types.