Couldn't.
If you're saying I should be speaking past tense... Vader didn't fix the advanced, FFG did by boosting the power of the ship over all. But Vader in an Advanced without the title is not going to make the advanced any better than it was.
Which is IMO pretty firm proof of why the generic ship matters, because if that isn't balanced and/or worth the points, the best pilots in the game are still going to cost more points than they're worth.