Yes, I have in mind really those seemingly endless reworkings of the Star Wars universe films which grow tiresome, at least to me. But there is certainly a risk in second guessing the original creators.
I think you'll find things are a little more complicated than that.

The risk though is inventing what the director did not want or excessive tinkering.
I think we are talking about the same sort of thing, just by different groups of tinkerers.
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Yes I can see that. The risk though is inventing what the director did not want or excessive tinkering. That is not a criticism just an observation. In my experience most fan edits works well in their own terms, but tend to go over the same ground.
I think you'll find things are a little more complicated than that.

I would not tolerate a fan-edit of my favourite books but do a film I love
A film takes a lot of influence and money to get made. Many times movies have things in them that aren't in the director's vision, but they had to appease someone high up. Author's don't have as much interference until they get popular. When I make fan edits, I normally take out most of the things I spot that aren't relevant, but were inserted to push progressive agendas or sell products or ideas. They aren't necessary to the central narrative and it's not what I paid to see.
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