I agree. The use of subs with aircraft is a gret combo for naval combat (even better if you have super subs). You can even make it cheaper if you have long range aircraft and jet fighter, transforming your fighters in better weapon than the original bomber.
I’m sorry to disagree, but long range aircraft benefits bombers so much it would be a waste to switch to fighters. Although saving 2 IPC per unit is nice, being able to bombard any territory or sea zone on the map at will is much too good to give up on - and thats what long range bombers do!