The warships really need an active sensor, you cannot shoot at something you do not have on active sensors
No armour and no shields mean that any hit these ships take will inflict internal damage, they will not last long in battle. Missile salvo's almost always have some leaks through point defense and each missile will be very bad for the ships.
The ElLINT module on the destroyer is odd, it will gather intelligence if you sit around an npr world but if you do that with a warship, they will open fire. A similar size EM Sensor is better.
Not sure why you have 12000 tracking speed fire controls , none of your weapons are on turrets or ships with a 12000 speed so the sensors are not doing anything for them, on the other hand I often have slightly too fast fire controls because they are used fully on another ship and I don't want too many designs;
Also you belong to the odd number heresy!. All ships should be rounded off to a nice neat figure with extra fuel or maintence , it is the way