Improvements that might have prolonged Sea Vixen service

What changes might have prolonged Sea Vixen service?

He would give it greater weapon capacity and range, which might have prolonged its useful service life.

A wholly different concept was unnecessary for the Sea Vixen. Greater weapon capacity and longer range were the most useful improvements. Those changes would have broadened the missions the aircraft could perform as weapons and fleet requirements evolved. The payoff could have been a longer useful service life before replacement by the Phantom.