Yes, I think authoring is the word, not mastering. Bad mastering would be if the disc didn't play or hung up or skipped. And from what I'm reading here the functionality of the disc works on other players, so that could be a player problem rather than bad authoring. I'm only saying there...
I just don't understand the use of the term bad mastering if the image on display is better than its ever been. Seems to me that's good mastering. If there's a good original 2.0 audio track that seems like a good thing, too. I haven't seen the disc in question, but it does sound as if its...