A named carrier predecessor was sunk at The Battle of Midway.
Converted ships always have some drawbacks.
“Converted ships always have some drawbacks.”
Looking at pictures of these ships they look like aircraft carries, even down to deck elevators.
I would bet that they could do a new construction of one or two that would make them more than conversions
Forgive me for splitting semantic hairs but this might be more of an... adaptation, to a purpose quietly anticipated back to the drawing board, rather than a conversion of say, a cargo (for example a coal ship, i.e. the USS Langley) ship to another purpose.