Even Overpowered could be done right.
It's all matter of "how'
For example, I view Itachi is OP done right.
He still feel like ninja.
You don't have the impression, he could fit Dragon Ball Z.
Orochimaru is also a good example, and the "lower' range of the Akatsuki, like Sasori, Kisame and etc.
Yeah, more time to refine things.
If we ever get bored, we can jump and skip. In shunens a lot of time, I feel like they are missing many opornouities in the lower scale arcs.
We can also give theme.
Like Futility-San question the very concept of "hope" for ninjas. And another theme, I subtly(or not) hinted.
What ideas you have?