i posted this on another thread earlier, but i found this video on youtube that someone had done and thought it made the scene easier to follow, and seems to make anakin look much more sith like.
http://www.youtube.com/watch?v=4puaVsdKUuk
solving the lightsaber continuity would seem difficult, but im sure some inserted homemade scenes of perhaps palpatine handing anakin a new lightsaber, and also obi wan taking his but at a separate location could solve this.