dwsiddall said:

The revision to the Star Wars movies come in three categories.

First, and most acceptable, are corrections of special effects shots and other technical type corrections. These enhance the film and are welcome if done correctly and unobtrusively.

Second are additions that Mr. Lucas thought would enhance or re-invigorate interest in the movies. These are innocent, yet annoying additions, such as the establishing shot for the entrance to Mos Eisley with the bucking Ronto and the silly Pit Droids.

etc...

Well, I find none of the above acceptable, at least not in the absence of a proper restoration of the original.

Part of what made Star Wars so groundbreaking, was the special effects. If you go back in and change the effects 20 years later, you lose that window in time, and along with it the artistry that went into creating them. It also paints over some original artwork done by great masters.