Until today, there was only one modification to consider for the GR-75: the Combat Retrofit, which added two hull and a shield for 10 points. It was a 25% durability boost for the ship, which helped it last a lot longer and required more investment by your opponent to kill it.
With Automated Protocols, I don't know that there's even a reason to keep the Retrofit in the deck.
Before AP, you had a choice to make every round with your transport. You could perform any action that was not a Recover or Reinforce, and accept that your ship could be torn apart like paper in a hurricane against anyone who decided to take a free shot at it, or you could spend your one action on defense and otherwise do almost nothing with your 30+ point ship to affect the battle around you.
Now, for half the cost and an energy point, you can get a free Reinforce token while still throwing annoying Jam actions, or Coordinating your low-PS pilots to pick up a target lock during the Huge Ship phase. And as long as you take more than three attacks to your reinforced section, you're generally saving the same amount of damage as the Retrofit would buy you.
Is there any reason remaining to actually use the Retrofit, other than "I don't have a Gozanti yet"?