doubleofive said:

I'm going to have to write up something explaining why I think we think fan editing is ok and the SEs aren't.

The difference is simple - intention. Revisited and other fan edits are done for fun, as a way to present the film in a new light, either improved from what already exists or an alternate version as a learning experiment. The SEs were done strictly for profit - the opinions against the majority of the changes and the lack of attention given to things that could have been fixed but remain broken bear this out.