Yes editing does take time as does revisions but couldn't they be almost done and we just don't know it yet? Pure speculation and yes wishful thinking but there is a possibility.

I remember reading her not being able to get on the plane with "the manuscript" and finally she was able to fly with it in her possession. Could it be that that were revisions and changes?

You never know but it would be great to have it out next year but remember the movie is also coming out so I don't think both will be release to conflict but it would be a good thing ...