Honestly, I think the re-titling of the original Star Wars has only served to diminish it's impact and role as the true first film of the series. My big pet peeve as a Star Wars fan is to have to hear it be called Episode IV: A New Hope, or when people call it "the fourth one" . No. This movie is STAR WARS.
Should we go back and change the title of every movie that is eponymous with the franchise which it spawned? Should we call the 1968 Planet of the Apes something else? Should we do the same for the 1984 Terminator? No!
I never understood why George had to change the Episode title. I find it so much more appropriate and quaint (in a good way) to see just STAR WARS in the opening crawl, and The Empire Strikes Back and Return of the Jedi shouldn't have had the episode titles there to begin with. I never understood why they didn't just have their unique "logos" in the crawls (we should all know the famous-yet never used anymore-logos for Empire and Jedi). But I never get too mad about that, since the original versions had the episode numbers anyway.
What really ticks me off is how all of these movies are now referred to by their episode numbers almost exclusively. "5 is the Best Star Wars, Episode VI is okay, A New Hope is so old!"...I hear "jargon" like this all the time. Even with the episode titles in Empire and Jedi, the films were only ever marketed, spoken of, or known as...The Empire Strikes Back and Return of the Jedi. No "Episode V" or "Episode VI" this...
Now for the Prequels, they were released, marketed, and spoken of by Episode Number in the first place, so whatever (plus they're really awful movies that I don't even consider part of the series "true" continuity, at least from my point of view).
But if you ask me, Episode IV: A New Hope belongs no where in what is the beautifully perfect original Star Wars film. And Episode V and VI only belong in the crawls for The Empire Strikes Back and Return of the Jedi, not in their titles or any discussion concerning them.