Overwrit

To the MC if we were to take him to the original DBZ, he has almost the same power level as Goku SSJ1 in the Buu Saga.

Besides everyone forgot that he is in nightmare mode, all power levels are insanely altered, Raditz had x1000 more than his canonical version.

The valid reason could simply be that he began to perfect the 3 basic jutsu to win.

The white power ranger suit from dino thunder looks better, in my opinion of course.

Although hardening is still useful against piercing or cutting attacks to add more protection, and soru is relative because it is a high speed movement product of the user's strength, so the stronger the better.

Is this a misinterpretation? I remember that Aizawa could not override multiple quirks on one person.

Not so much, in Dragon Ball there is the concept that using techniques like Kamekameha or Kikohu can temporarily increase the power level.

The problem is that it has things relative to the strength/importance of the corpse, so in Meteor City it's just collecting mostly useless stuff.

As a concept, if he only refers to art as something simpler like music, paintings and so on, he would have no strength, just because he is good at music does not mean he can create almighty sound based jutsu. Anyway, it was seen later that he was a general all-around talent.