I'm in the "no NPC faces" camp because it's easy to do badly, as anyone who had the misfortune to buy X:Rebirth knows. Even the earlier X series had some laughably bad NPC faces, especially the cartoon aliens.
It's not as simple as just using an off-the-shelf face generator algorithm either. There are all sorts of considerations for gender and racial balance, and leaving it up to the game's art director to decide what uniforms and hairstyles will look like in the future. "Oh, you didn't know everyone in the Empire wears a Roman toga? Well, you do now!"
I'd rather use my imagination. Frontier can build a larger imaginary framework for the Galaxy, if they don't have to show every little thing in detail.
They'll have to do something in this area when we get to the "walking around stations" DLC. But I almost wish they'd just have everyone wearing space helmets and face-obscuring visors, like the opening of the launch trailer, so I can still use my imagination.