I can't think of any artist, except Battles, that I even like enough to listen to a leaked release from.
To your point:
1. I agree. Though for me, I listened to Gloss Drop 3 months prior to it's release and my opinion/listening only increased after hearing it in high quality. I doubt that will change with the new record.
2. I don't feel I've disrespected the artist. I support the artist. I've purchased every Battles release and have paid/will pay to see them live.
Like I said, I'm going to wait for the release to listen again...just wanted to share my initial thoughts on it.