Fleet Air Arm control and engine priorities

If the Royal Navy had retained control of the Fleet Air Arm, how might British naval aviation have changed?

The service would probably have pressed for more powerful engines because the Royal Navy strongly valued speed and power.

The answer focuses on engineering priorities rather than a wholesale redesign of the air arm. Continued Royal Navy control would probably have produced stronger demand for powerful engines. The Royal Navy's appetite for speed and power supplies the institutional reason for that judgment. Service ownership can influence aircraft requirements, although this remains an alternate-history argument rather than a certain outcome.