The onboard weapons/systems are okay for freighter, so I won't knock that, but the overall storage capacity is put in danger by the marked lack of large turrets to protect it. There is also not enough turret coverage of all sides of the ship.
You can do well in the ship, though don't expect anything spectacular when it comes to defense.
I would suggest taking the mass that is in the drones and putting it in larger turrets whilst also putting more turrets on the bottom.
I'd give it a 6/10, which I guess is 3/5, but is a little more than average. Like from a 0-10 system I think it is slightly over average at 5 which would be a 6.
I went with the drones because I liked the look of them.