I just watched the donner cut again, and I realized that I actually really like the world turning ending. I think it makes sense that he does it again, because each time he does it, its to save Lois, once physically and once emotionally. On the balcony, we see she's an emotional wreck, and Superman turns time back to save her from that emotional hardship. Turning the world around it the only way to erase her memory that he can think of, because he did it recently to save her, so naturally, he'd do it again. It makes sense, and is a good ending.

I've never done a Fan Edit, nor have the technology at my disposal to do so, but I know that if I could, the only edit I would make to the Donner cut is to remove the last Diner scene, and go from the final scene at the Daily Planet to Superman flying around the earth, and end there. The point of this big, 2 part Superman movie is literally Superman getting into the suit, on a metaphorical level. He does it in Superman 1 literally, but throughout the two movies, he struggles to find exactly what hero he is, and what his true role on the planet is. He screws up and causes mishap. He releases Zod from the Phantom Zone, throguh inadvertantly. He gives up his powers and sacrafices being with his father to get them back, but in the end, he knows his role. He's become his father by not being able to be with him anymore, and has become what his father wanted. The series can actually end on that note, knowing that he will now go and continue being the earth's savior, that it was a long, long struggle but he reached that goal. Having the diner scene in the end not only screws up the continuty and logic, it weakens the ending a little bit. Showing that his life as Clark, and as Superman, will go on in the best way is a perfect ending. The diner and his revenge is unnesesary. Of course, only cutting that one scene doesn't merit doing a whole fan edit, but that would improve the film.