If Watto was redubbed he could explain that the Hutts have been driven off world and the market flooded with droids making slaves too expensive to keep.
By removing the Seperatists from Tatooine the Republic could have create the situation where the Hutts and slavery could return making the Hutts grateful enough to the Republic and later the Empire to not get in their way but remain free agents.
As the Empire blaimed the war on the Jedi, Jabba would have a special dislike of Jedi.
Anakin's mother could be dragged off for arena entertainment and uncover her and Obi-Wan's capture around the same time.
I always thought it odd that Anakin goes from being a child murdering vengeful broken man spitting curses at Obi-Wan to going back to cracking jokes and rescuing Obi-Wan to being frantic about Padme falling out of the dropship and leaping in to fight Dooku.
If somehow finding captured humans during the investigation of the Seperatist camp could be dropped in between not only would Anakin be furious about the death of Jedi in the arena but he would also be enraged by the man responsible for his mother's death and possibly Padme too.
His emotional pain that Yoda picks up on could guide Yoda to him and prevent the fight with Dooku resulting in Obi-Wan and Anakin's death.
It's important for Palpatine that Anakin turns and if he could make that happen via the same mechanism he starts his fake war, so much the better.
Anakin spends a lot of time slicing up Geonosians something Padme would understand and not recoil from like the massacre of innocent children.
It's hard to put her horror of the killing of the Younglings into ROTS when it's a pre-existing pattern she signed a marriage contract with.
ROTJ and TPM have already blown the idea of Tatooine being a nowhere place.
To the Romans Judea was a nowhere place but centuries on people are still blowing up people all over the globe because of the attachment to that piece of desert.
If Hoth had turned up in ROTJ and TPM it too would cease to be a nowhere place.
Tatooine is the most important planet in the story already, far more important than Coruscant or even Naboo which get similar screen times because of it's importance to the OT making a story as simple as possible often leads to a stronger story.
When most people think about WWI they think of trench warfare in continental Europe and forget the middle east yet Lawrence Of Arabia is none the less one of the most impactful pieces of cinema covering that period.