I'm cool with the idea that the Jedi aren't as squeaky clean as Ben makes out to Luke (Ben has a habit of pulling Luke's chain and outright fibbing even if you forget the PT).
So for reasons of having to be part of the Republican system and not dictating to it like Palpatine's Empire I can see why the Jedi might not be able to just walk around doing whatever they please even if it's for a good cause like freeing slaves.
I can see that being a very sore point if your parent falls fowl of that sort of diplomacy and you are part of the force charged with defending the system that isn't helping her.
So it helps make Anakin more sympathetic if he has a understandable grudge which grows into something unforgivable like child murder... rather than starting with the child murder like the current PT does.
If we are to forgive Vader we have to have a degree of empathy with Anakin before he goes off the rails. It also helps us worry about Luke later if Ben doesn't seem to have learned from his prior errors (which means he can't be perfect either).
I personally would like child Anakin to stay.
I would like to see the three prequels sort of do what they are meant to be doing only succeed.
If that takes re-dubbing Jake and Hayden I'm all for it.
If I were the author of the trilogy I wouldn't have started with Anakin that age but George is the author he just isn't a good writer.
Imagine you read the back of the novelisations but hadn't a clue what the film was like. That's how I would approach the PT and ROTJ.
More of a better quality rebuild than a total redevelopment.