[jki275]

The Navy spearheaded the JSF for both its CVN fleet and for the USMC. The JSF is not the first single engine Naval aircraft, and its engine is reliable enough that it's not an issue. People look at the tomcat and hornet and make up requirements that have never existed.

There is no such thing as "easy to change", you would have to redesign the aircraft from the ground up. You don't "navalize" an air force asset, you have the air force use Naval aircraft if you want dual use. The F22 is not and never will be a carrier aircraft.