First couple of things;
1) What is the range of your current missiles?
2) Your missile fire control seriously outranges your ability to actually see targets (FC range is 108m k/m, Sensors are 36m k/m)
3) Your launchers are very slow at 90 seconds to reload.
4) Its better to have bigger Thermal Sensors over EM detection sensors
The rest of the ship looks pretty good. Your speed is good for the engine tech, maint is very good, fuel is average.
Recommendations;
1) I would recommend shrinking your missiles down to something that has a slightly better rate of fire, like size 4 or so. It also lets you pack more tubes, which is important if the NPR has any sort of anti-missile capability. It also improves your reload rate. Also lets you pack more missiles. When it comes to missile boats, more ammo = better.
2) Add more missile tubes, 5 for a cruiser is pretty small.
3) Spend some RP on improving your missile reload rates.
4) Swap the passive thermal and EM sensors. If you want one bigger, go with Thermal over EM.
5) Having a little extra range on the fire control is good if the NPR has ECM, but 3 times the range of your active sensors is too much. Downsize the sensor, it will save you crew, minerals, and space.
6)