Replace Greedo with jar jar. Then the misfire will make perfect sense.
Show leia stripping off her rebel clothes and putting on that night gown in rotj, if it was filmed of course. If not, just get someone to do a body double and never show her face for more than a second or two.
Fix the dvd mistakes erase the emp's slugs. Make anything that looks too cgi more real. Realize it.
Replace Hamill with Jake lloyd, he's old enough. Replace Jame's earl jones, he sounds too good. Hayden would do it betterer because he's younger and more powerful.
Make a scene where the ewoks are buried and show that they have magic body armor piercing arrows so that whole thing makes sense.
Make luke's fight against vader in rotj not look so pathetic. It's powerful stuff, but after the pt, the baseball bat swinging thing just doesn't cut it anymore. cgi it. realize it. sell it. That's the way.
And give R2 cutesy little sounds so he's more P.U. ish and make the ot more P.U. ish overall by adding background animations of stuff like extra wampas having a party during the hoth battle, then being stepped on by one of the At -At's feet and killed.