Well, this thread has a life of it's own.
I have to admit that I was not thinking so much of the 'prop' carrier as a combatant, but as something else. I can see such ships being made far to expensive if we were to try to have it serve as a poor man's CV, what with all the expensive electronics and weapons systems and such.
On the other hand, if such a ship were deliberately kept 'cheap' then I wonder if it could serve as a force modifier? Take the Iraq and Afganistan theaters the US is fighting in right now. Could something like a P-51 not still serve in the CAS role? Do we really to use an F/A 18 in such a role? Couldn't a P-51 be be made night capable by the simple expediant of wearing night vision goggles? Are there not places where a jet, even flying just above it's stall speeds cannot go, but where a P-51 type aircraft could operate with ease?
Steep, narrow mountain passes come to mind.
Also, wouldn't it be good for the guys on the ground to be able to have those flying guns orbiting overhead (and constantly be in communication with them, so the pilot know eaxctly where the friendlies are), so that they never have any wait time to get an immediate airstrike? Sure, the jets can go from carrier to target much faster, but can they orbit for hours and hours until the best possible moment to strike? And how much would it cost to have jets in such a role?