It's certainly looking better as a ship, good speed, armour, range and maintenance life, Next you want to maximise its offensive capabilities, 2 launchers isn't going to do much unless you have a large group of these. You can save space which you can devote to more launchers by removing the sensor and putting one on a dedicated sensor platform. Also by raising the resolution of the fire control you can get more range or save space, I would aim for resolution 80 which could target ships half the size of your cruiser, but resolution 60 is good too.. Low tech shields are kind of useless especially if you want this ship to stay out of the fighting zone and lob stuff at long range so you can probably remove those too. If you can squeeze 4 launchers onto it you've effectively doubled the offensive capability of the ship, see if you pare down other systems to achieve that goal while not going over 8k tons. Maybe pare down the range of the missile to 200 million, increase the warhead, design a 200 million range sensor and fire control, put the sensor onto a dedicated sensor ship.