Long have I waited for a project like this 😉

Padme’s bedroom - I think I wouldn’t include this one. It’s terribly cheesy and it doesn’t add anything meaningful to this movie.

Geonosian Trial - if it was up to me, I would keep it.

The Lost Twenty - In my opinion you should add it. I agree that it may feel a bit off for a Star Wars movie to use this kind of flashback, but this short scene adds a lot to the film. And the flashback itself could be probably shorten easily. Besides, Qui-Gon is barely mentioned in the Episode II. From a perspective of someone who watches SW for the first time, in the chronological order, it could be kinda weird that the guy who was basically the protagonist of the first movie, a mentor to both male protagonists of the sequel, and a student of the movie’s antagonist, is barely mentioned in the film. So this mention + a little flashback could actually work pretty well in terms of narrative and continuity.

About the Kenobi scene - as much as it didn’t fit in “Kenobi” at all, I believe it would be a great addition to AotC. It establishes pretty well the complex relationship between Anakin and Obi-Wan. It shows Anakin’s temper and arrogance, it actually gives some more context to Anakin’s perspective about Obi-Wan holding him back, and vice versa, when Obi-Wan believes Anakin is too reckless and short-tempered.
I think this one should definitely be included.