Atlantis said:

I just watched that Greedo BD shot. I think the subtitles move way too much. It's more of a distraction and you notice the subtitles instead of the scene.

I honestly don't see why they need to move. You use the BD shots (or other sources) to have the best quality, clean shots. So your work is like a restoration. In a restoration you would also fix any subtitle problems.

So to have them added intentionally, is no restoration and if you are not doing a restoration, you should not use the clean BD or HDTV sources.

Sorry but that's bullshit. In a restoration, you're trying to restore the way things originally looked and since the subs did originally shake, it wouldn't be a restoration if you didn't make them that way. You seem to be mistaking digitalness and cleanness for quality. I use these sources because they have the best resolution. In an ideal world, we'd have a scan of SW that looks like this:

or this:

Unfortunately these unnaturally cleaned up BD and HDTV captures with screwed up colours and crushed blacks are the highest resolution sources we have, so they have to do.

Why not add grain and scratches and hairs?

Funny that you should mention this in such an ironic way, because I'm actually seriously considering that. I even already did some tests and I like what I'm seeing.