Maybe you could test it out with corvettes, make it so moving targets are harder to hit. If it works, move to bigger ships. You could almost think of it like Star Wars battles. The Star Destroyers kinda sit still, while the TIE fighters move around and are much harder to hit. Something like that.
Unfortunately, I don't have any screenshots of this bug to help, but I was playing a single-player game last night with Occupation victory enabled, just to see what it's like. First, I kinda like it, but the AI never went after the planet (which was a disappointment considering all the defenses I put up there), allowing for a very easy win. However, my problem comes in with the neutral AI guarding the planet. The name of that group in question was "E
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