1. "The Uchiha Clan doesn't seem like that. The Uchiha Clan is well-behaved. The Uchiha Clan wouldn't dare beat someone up in the street. The Uchiha Clan..."
Answer: If the Uchiha Clan really were well-behaved enough, they wouldn't have been wiped out.
The Second Hokage targeted the Uchiha Clan precisely because they weren't well-behaved enough.
We can reason backward from what the original depicted.
We only saw Uchiha Fugaku and Uchiha Itachi trying their best to avoid conflict between the clan and the village.
But don't forget that a group of Uchiha ninja went to Fugaku together and asked him to launch a takeover of Konoha.
That proved that people within the Uchiha Clan had different mindsets too.
No clan consisted entirely of saints, and the Uchiha Clan also had people like Kagami Uchiha and Uchiha Itachi, who were wholeheartedly devoted to Konoha.
Right and wrong, good and bad-the distinctions depended on where you stood.
From Uchiha Kan's standpoint, his younger brother had been severely injured. Even if it had happened in a fair duel, there was no way he could feel good about it.
On top of that, Uchiha Kan had already awakened his Sharingan.
The Second Hokage explained it very clearly: Uchiha clan members who had awakened their Sharingan had very different mindsets from those who hadn't.
That made something like beating someone up in the street understandable.
Besides, Uchiha Kan didn't simply attack in the street. He first threatened Uya verbally, and only actually attacked after Uya had quietly provoked him. Even then, he used Taijutsu.
He only used Ninjutsu at the end, when he had lost his reason a little.
2. The issue of recovery lag in the protagonist's moves.
Answer: How should I put this... I really want to write a book where things have a basis, just as I explained the first issue.
Many readers wanted to see him develop some advanced Ninjutsu.
So, taking your opinions on board, that's what I plan to write.
But there still needs to be a reason.
If the protagonist were invincible, there would be no need to develop any Ninjutsu at all.
He could just smash everything with one punch.
But now, since I'm going to have the protagonist develop other things, I have to come up with a reason.
So I chose recovery lag as that weakness.
In fact, if I hadn't written it in, nobody would have noticed. Whether it exists or not is still entirely up to the author.
And I'm an author who cares a great deal about readers' views. I'm considering all your opinions.
After going over it countless times, I finally designed this part of the plot.
3. The issue of Ninjutsu classification.
The original did explicitly state that a Ninjutsu's rank had no definite connection to its power.
Ranks like A, B, C, and D only indicated how difficult they were to learn.
Of course, as a general rule, it was still fair to say that A-rank Ninjutsu were stronger than B-rank Ninjutsu.
Precisely because of that, I simply changed Ninjutsu ranks into classifications of power.
Because writing it this way keeps things from getting confusing.
Otherwise, I would need to create a new system.
One independent of the A, B, C, and D Ninjutsu ranks already present in the original, which would feel even more out of place.
So I simply classified Ninjutsu ranks by how powerful they were.
That makes it easier to write.
A novel's protagonist isn't a manga's protagonist.
In manga, you can dispense with any ranking system, and the protagonist can eventually use all sorts of cheats to stomp his enemies.
But that doesn't work in a novel.
Even if a novel's protagonist uses cheats, they still need some basis. You can't write him like Naruto, settling things with Nagato and Obito in a few sentences.
So a reasonable, easily managed system is a foundation.
4. The issue of developing Ninjutsu later on.
I've seen many readers bring up the Six Powers and Haki, so I'll specifically address them.
Because the worlds of One Piece and Naruto are different, Might Guy could only use Geppo with all Eight Gates open. Soru counts as the foundation of Geppo, so wouldn't it take at least six gates to use it?
After learning Soru, his speed wouldn't be below the Fourth Raikage's. Combined with his strength, that would basically make him invincible at Kage Level.
As for the other moves, they're all somewhat lackluster.
The high-speed movement of Soru and Geppo requires a foundation of physical strength. The Naruto world emphasizes chakra, while the One Piece world emphasizes the body itself.
Physical strength in One Piece is greater than that of the ninja in Naruto.
Even at Kage Level, ninja have a hard time resisting blades with their bare bodies, but in One Piece, it's child's play. All you can say is that the power systems are different.
He may develop Soru and Geppo later on. Barring anything unexpected, that probably won't happen until the Third Shinobi World War.
As for Haki, that stuff feels far too out of place in the Naruto world.
But it can be expressed in other ways.
Observation Haki could take the form of shock-wave sensing. As for Conqueror's Haki, Hashirama Senju's imposing presence that scared Hozuki Suigetsu into wetting himself was very similar.
As for Armament Haki, I think the physique granted by Sage Mode, with natural energy added to the exterior, seems very similar?
Natural energy = Armament Haki?
Six Paths power is similar to Logia, and natural energy is similar to Armament Haki, so it's effective when attacking Six Paths?
Well, let's slowly find the answers to these questions as this book's plot unfolds.