As a non-combat related suggestion, you might consider increasing deployment times. My first generation of warships shared the 12-month intended deployments of your designs, but I increased it to 18 months in subsequent generations because my task groups weren't completing "task force training" before the crews became antsy, but the longer deployment-times proved beneficial of themselves. (I also use a very small, very slow fleet trainer---packs right into a carrier so I can go train afar afield, if need be---so my ships don't waste much fuel during training.)