Ships of this class nowadays don't have much threat, though it should be well protected from enormous air raids and other ships of its class. I guess putting 6x 40mm gatling guns'd be good against missiles. Adding anti-sub weapons is not a bad option too. Deflectors can make it even more difficult to sink a ship. Then again, why not make this ship submerge-able so it can get out of trouble when it needs to.
Just suggesting though. Anyways, great work on the ship. Hope it sees action soon.