Given that the AI seems to just love anything that has strikecraft, I wonder if the SDV wouldn't be better off not having strikecraft. I had a Legendary AI assaulting my planet with at least 20-30 of the things and nothing else. The AI seems to go "Oh look, this ship gets two strikecraft squadrons, I'll build lots of these!" And the AI seems to fucking stupid to realize that the SDV is not a combat ship in the slightest. It kind of eliminates the challenge when the AI spams a single ship that is easily defeated by pretty much anything. Later in the game, the AI eventually grew out of it and started building normal ships, but during the period when it was spamming SDVs, it would've steamrolled me if it had decided to build anything but SDVs.
The SDV spam allowed me to get my shit together and eventually build up a superior fleet that it couldn't crack. I know the AI is pretty limited in Sins, so I figure the better solution would be to eliminate opportunities for the AI to be senseless and moronic.