Well. It's a bit crude but I had a quick hack and slash at them to illustrate what I think might work.
127mm
or 76mm depending on the batch
96 strike length cells which still gives you an OMGWTFBBQ amount of weapon options
Separate AShMs or capacity for them
ESM and COMMO tower amidships in a rearranged central plaza (lots of space behind those bulwarks for things)
Modified aviation facilities, hangar brought further back (can still take a Chinook as is) and added a flex deck straddling the aft VLS
Goalkeepers fore and aft with good clear arcs
Lower flex deck as before untouched
Slightly lowered upper-works and towers
~Mark.