TPM: Age up Anakin, ensuring that he can be played by the same actor in all three films.

AotC: Give Count Dooku more screentime and character development.

RotS: Reinstate, in some form, Padme’s subplot with the dissident senators.

ANH: Remove C3PO’s line about how he “can’t abide those Jawas. Disgusting creatures.” It’s just a bit morbid, since moments before, 3PO was piling Jawa corpses on a pyre.

ESB: Tone down Han and Leia’s bickering. (That includes her kissing Luke.)

RotJ: Edit the final battle so that Vader goading Luke about how “It is the only way to save your friends” comes at the same time that Han and Leia’s lives are most in danger.

TFA: Give Finn a more serious, soldier-like demeanor.

TLJ: Luke lives.

TRoS: Luke trains both Rey and Finn on Ajan Kloss.

Rogue One: Have the Death Star Plans be actually transmitted to the Tantive IV, which is not at the battle.

Solo: Make it a comedy.