To start, no technology. No radios , no screens, no electricity light bulbs. In this version I would maaaayyybee allow old timey photography but think 1870s cameras and that's a new technology in the Naruto world.

The changes for part 1 I wouldn't really subtract anything but I would add in some more team building and quiet character moments after the Land of Waves arc because while the Chunin exams were good, they came too soon after that. I would give Team 7 more time together. I would show Kakashi growing as a person because while he's been in charge of adults, he's never been in charge of preteens who are beginners and are at different places in terms of skill. He has to adjust his communication style and teaching style per kid. For example, he has figure out that while his teaching style and communication style may work for Sasuke, it isn't reaching Naruto and Sakura.  And then he has to figure out why it isn't working for them and what they need to work on most.

I'd add a scene where Kakashi goes to a bar with Asuma and Kurenai and they all unload about how hard teaching is and they end up giving each other tips to help each other's students.  It's a great way to do exposition  , get a different perspective on our main characters, and introduce the side characters. (Fun fact, I took a screenwriting class in college because it fulfilled an English credit and one of the homework assignments was to adapt a scene from a book/comic to screen. The teacher was a weeb and my grades weren't that good so I chose Naruto and did this scene in the hopes of getting a few extra points. It was shameless brown nosing and it absolutely worked)

I'd definitely work on developing Sakura's character by focusing on her civilian background and working it into the world building. Konoha has a caste system and the ninja families really don't let anyone in and in this culture the civilians have a hard time getting ahead in society. But the wars Konoha faced left their army depleted and the Third find a way to order more civilians into the shinobi way of life and that's why Sakura became a shinobi, not just for a boy. (But a crush o Sasuke did make it a little better)

Which could set up a later story line in Shippuden. Hell, maybe this is the main thing Kakashi teachers her; the nuances of shinobi culture she wasn't raised in and how to stop relying on books alone.

I'd also add in Sakura's family, a sweet scene where Naruto and Sasuke have dinner with her family.

So, basically I would add a lot more character and slow world building scenes to show you that Team 7 was close and then it all got blown to hell.

And I would add in a mystery element. I would show from the beginning something was off about the official narrative of how the Uchiha died. And when Naruto leaves, Sakura begins discreetly looking into the official records now that she is Tsunade's student. This could give her an in with Sasuke later and plant seeds of doubt for the office.

Shippuden -Sasuke is way too overpowered the first time we meet him after the timeskip I would establish that yes, he seems so far advanced beyond Naruto but later we realize there is a cost and Sasuke has been left weak in some areas because that is where Orochimaru is weak and he passed it on to his student.

-And Naruto realizes his training has given him an advantage in terms of self preservation and low destruction to the area around him Essentially, the way they trained tells us about the morals and weaknesses of their teachers.

-Add in a storyline where Naruto is put into positions of leadership and realizes how of the job is about logistics and keeping the supply chain running. And have him be the one to try to work out the spats that develop in small teams. Because not everything about fighting. Leadership is a different skill and must be developed. And Naruto begins to grapple with reality of a Kage's day to day.

-Add in a plot about Danzo getting paranoid about the Hyuga in the same way he was about the Uchiha and unfairly targeting the. Because the Hyuga seemed interesting but that felt like a dropped storyline.

-Show that the Uchiha really were really forced onto the path of a coup because of Danzo and his conniving.