I think it was mentioned somewhere earlier but maybe should go to suggestions:
Spider turrets would be much better if they would be capable of splitting shots between targets based on engine damage.
Currently even if you have 20 of these they all will shoot at one cruiser - even if they could disable at least few of them in one volley of engine damage.
They will chenge target after first salvo actually gets to the target and it's engines are disabled - but considering their rang it can take a while before shots hit.