Changing the mixing of guitar is hardly butchering anything. It's just a mixing choice. I'd look down upon that far less than I would at people rerecording parts for live albums later in the studio. And I barely look down upon that either since pretty much everyone does that anyway.
>>Also 8 songs in the CD vs 17 songs in the DVD.
So what? They are totally different experiences with different performances and different purposes. Essentially different albums under the same title.