Yeah, he kind of regretted saying what he did, and had to write a longer Twitter statement about--sorry for the sass, it's not directed at you--the phase of filmmaking known as the "editing" process. Fans were too excited for extra footage to remember that it's hard to go back and shoot things months later without spending gobs of money and destroying multiple production schedules by getting the cast & crew back, so (I'm told, I have no personal knowledge of this because I'm just some guy) it's better to have too much than not quite enough.
He did say a lot of removed scenes were very late cuts, so there's at least some effects work AND OFFICIAL SCORE WHY AM I YELLING done for most of them. Someone will certainly splice it all in within 45 minutes of the Blu-Ray release, but since downloading things like that is illegal I guess we'll never know how it looks all pieced together.
Very interesting! I remember reading that they started with a 3 hour long cut and spliced down from there. It makes me really curious as to what they felt the need to cut out. Excited to see what fans get up to too, I think there is multiple re-edits for each non original-trilogy movie. I might even have a stab myself when it gets release but I would never do that because it is illegal to download films. You wouldn't steal a fan edit.