There were only two things I didn't like.
One was the lightsaber. Just like the twin-bladed saber, it's a case of "looks cool, but functionally idiotic once you think about it". The crossguard may be intended to protect you, but I can see it easily getting in the way and causing injury to the user. However, if it's just some kind of ancient model with an exhaust vent, I can deal with that...
Second, and worse, is something that plagued the PT and almost all Hollywood blockbusters for many years now - it looks too busy. CGI and colour timing aside, every frame just has too much going on. Being able to focus on just people, simple sets, simple objects, and a stationary camera helps pull you into the movie. But adding stuff like close-up group shots, blowing sand, flying water, quick pans, blur, bloom/lens flares, atmospheric effects, and just simply too much detail induces confusion and distraction.
Even one of the lesser Kurosawa films will probably end up being much more entertaining than this.