Truthfully I doubt it will matter much. Soon after release you know modders will be hard at work modeling what ships are not yet in-game.
The CVE's should be a must as well as the Skokaku, Zuikaku, Shinano, and possibly the Unryu class ships(tho they saw little service they were introduced at a time when US subs were truly killing machines and even one was damaged by a sub).
Without a doubt I'd love to see them all but seriously probably will not.
If I had my pick as a sub commander during the
WHOLE war which CVs to implement it would be these.
CV Shokaku and Zuikaku(both saw lengthy service throughout war)
CV Junyo and Hiyo(tho hardly considered fleet carriers these 2 served lengthy careers)
CV Shinano(tho very very short service life would be a great target in the periscope)
CV Unryu, Amagi, and Katsuragi(tho hardly any service between the 3 would be great contribution for late war hunting in Japanese waters)
CVL Zuiho(also saw alot of service)
CVL Chitose and Chiyoda(saw a good amount of action during 1944)
CVE Taiyo, Chuyo, and Unyo(all 3 sunk by submarine, escorted convoys)
CVE Kaiyo(used for escorting convoys and ferrying a/c)
CVE Shinyo(sunk by submarine, escorted convoys)
There would be my wishlist.
