I think Lucas could have done soooo much more with these three films if he had said screw the kids, and appealed to the millions of existing Star Wars fans. Too much G and PG material for a story that honestly should have been rated PG-13 to R.
The transformation of Anakin Skywalker to Darth Vader is supposed to be truly dark and probably far deeper and violent. I'll go see it, buy the video or DVD and watch it a few times along with the other 5. I'll be disappointed, but oh well it's the missing piece to the ultimate epic film.
Only one thing could have saved this movie: More ... and I mean much more ... Jar Jar Binks