The vast majority is all brand new. There's only slight updates/rework. Mainly dialogue and stuff. There's many more scenes in the school, as well as at the Tattoo Parlor and other places.
And like the past Roxy updates there are paths you can take that give different options. It's quite a large update and if you play yourself, I think you'll realize as much. Especially if you try the various dialogue options in some scenes.
I've been holding off playing until I'm sure nothing important is broken and needs to be hotfixed. For obvious reasons I'd rather not run into something gamebreaking and then re-replay the content I've already replayed.
Not too sure about additional dialogue and options, at this point I'd very much prefer for the story to progress instead of branch, but that's just personal preference.
Anyway, I'm not knocking it until I tried it, the changelog just didn't look that promising after a very long wait for this release. I'd be happy to be proven wrong here.
