[Asmala]

If the other one of ship's SD misses the normal weapon's damage go to shields. Next turn there's no shields so SD are used to next target while normal weapons finish the first ship. Thus SD are ahead of normal weapons. And they also will stay ahead because normal weapons will miss as well. So it's not so big deal if SD misses.

Bigger problem will be the balance between SD and normal weapons. The shield damage to normal damage ratio should be same as shield to hp ratio. Not an easy goal to achieve.

Ships using organic armor/weapons cost about the equal amount of resources than normal ships. The benefit is that normally organic planets aren't used much so you get "extra resources" by using organic stuff. Of course you can put research centers to those organic planets but usually there's enough places for them.

My opinion is that OA is quite well balanced compared to shields. It has its benefits but aren't too powerful.