Alright I would start.
1. Firstly your point about Haku being light speed I believe is wrong, it was never stated that moving at lightspeed would hurt Tsuande but that the process of the transportation device (in other words its mechanics is what hurts the person travelling.
2. Haku did not jump between the mirrors or anything like that he did not physically trave in between the mirrors he was literally reflected to the mirrors so it does not scale to any of his speeds and only gives him the surprise advantage in the mirrors. Also when he jumps between them that is the only time he can attack and that is when he is in fact not light speed. So there is no need for an outlier there.
3. It is natural light as that is the point of the Sage of Six paths powers.
4. Naruto did dodge it. Many people argue that Madara swung his head to hit Naruto. And he did swing his head however Naruto still had to dodge the extension, as shown in the manga his TSB bo was in from of his face the light extends and cuts the bo Naruto then swings his head to the side as it attempts to hit him with the light and Madara try to swing it after Naruto's head. This is confirmed in the anime and it is shown more clearly.
Naruto swinging down the TSB it is in front of his face. Madara is staring directly at him.
Madara fires the light fang and attempts to swing it to follow as Naruto dodges.
5. Now is Naruto light speed? Maybe, I believe he has lgiht speed reactions not move speed.