@Harmy: rutracker has a 25gb version of the HDTV broadcast.
And yeah, it's horrible that they changed so much for the blu-ray. And actually there's one more "change" in the 3D version other than being open matte. It's mentioned at the bottom of that article I linked but it's not as visible there:
To convert the movie to 3D they had to cut out all characters from the backgrounds, and as a result all characters have blurred edges, more or less. It's very visible if comparing the edges of their hair.