The "deleted scenes" argument really doesn't work for the Special Editions. Lucas didn't restore a bunch of scenes that were originally cut out from the theatrical editions (except for the Biggs and Jabba scenes). Most of the newly added scenes in the Special Editions were made specifically for the Special Editions, they weren't originally shot when the movies were being filmed. Also, not all of the new things in the Special Editions are newly inserted scenes. A lot of them are already-existing scenes that Lucas decided to "improve" (Greedo shooting first, Luke screaming as he fell, badly-done CGI in Mos Eisley and Cloud City, the Sarlaac's beak, and so on). And some of the already-exisiting scenes were replaced altogether by new, digital ones. The main one that comes to mind right now is the Battle of Yavin. Some of the old shots are kept intact, but most of them are now new, digital shots (even though most were based on the original shots).

So our problem with Special Editions isn't that Lucas is adding in deleted scenes (the Jabba scene and the Biggs scene, which were pretty much the only REAL deleted scenes - all the others were made just for the SEs). It's that he's modifying already existing shots and sometimes replacing them with new, digital shots.

And by the way, I completely disagree about Return of the Jedi being the worst Star Wars movie. Worst of the original trilogy, possibly, but certainly not the worst of all of them.