More turrets is a good option early game since most fights are vs fighters and the heavy guns don't really get used. That's why I used the Ramadanta in the past for it's extra turrets. The trade off was it had no slots for heavy guns. I see the Astarte as more or a tank ship so more armor and poor maneuverability seems right as a trade off. I would add a 4th system slot so it seems like an upgrade from the previous ship. If you plan to keep the Heavy guns then no more than 4-5 turrets otherwise it would seem like a downgrade when you are forced to get the next mothership.
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