Dude, you guys sound like it is illegal for battleships and battlecruisers to drop its guns.
Now, I really don't think and do not want America to have more BB/BC, since our cruisers (and even destroyers!) already have Tomahawks onboard, and maybe drones.
I don't think manpower is a problem. Just compare the CVs of America to those of Britain and France, and you will notice, it is possible to reduce the crew on big ships. American CVs right now seems pretty darn crew-inefficient.
As for the BBG/BCG's new weapons, you can have:
Instead of 16' guns, large calibre MLRS(A-100 or WS in China, Smerch in Russia, etc) and 6' inches, and give the guns the ability to launch missiles as an option.
Instead of those 80 40mm guns and 49 20mm guns, a long range SAM(like SM-2, THAADS, HQ-9, etc), maybe a 2nd short range SAM system.
16-24 ASMs (Hopefully as good as Shipwreck is at least on paper, but not as huge, C-602?)
LACMs like Babur and Tomahawk for long strike strike.
ASROC and torpedos for ASW (Default) (Maybe even mortars of some sort, as they can't be jammed)
Choppers and drones (Default, replaces the seaplane, but you might want to include a seaplane too.)
8 CIWS
Dinghies and ROVs for non-combat uses.