I can't wait for the sequel because I'll be able to play as Luke Skywalker

I know exactly the reason for the changes to Episodes 4,5, and 6.  George Lucas tinkered with A New Hope, The Empire Strikes Back, and Return of the Jedi primarily to keep in line with The Phantom Menace (which explains the change of Jabba the Hutt in A New Hope), Attack of the Clones (which explains why Temuera Morrison redubbed the voice of Boba Fett in The Empire Strikes Back, and maybe even why the hologram of Emperor Palpatine was changed to Ian McDiarmid and that was a change that I thought was a good change), and Revenge of the Sith (which explains the most notable change which was in Return of the Jedi when they changed the ghost of Anakin Skywalker from Sebastian Shaw to Hayden Christensen.  Also, do not call me an idiot or anything but I liked that change and it explained the saga better).