That's true. Although that is another extremity in that Toriyama DIDN'T like Vegeta at all initially and never understood why he is so popular, so he ragged on him in the story, but ever since changed his mind. No, I feel that a rival should be used to push the MC to greater heights and challenge them but not be favored over the MC by the author (Sasuke, Bakugo) nor should they be worfed just to make the MC look better (Vegeta, at least in Dragon ball Z). That's just my opinion anyway
Now that's true but with Sasuke any power up Naruto got didn't really matter since Sasuke got randomly got stronger. So then it didn't matter.