I already kinda discussed something similar here. (Since I'm on mobile the link thing is working weird so here's a URL: https://forum-narutoen.oasgames.com/page/show-post-25842-1.html)

Though you do have a good point, there are many characters who should, in theory, be more relevant due to their story importance. Hopefully through skillbooks and NOT alternate versions though.

I actually like that minor characters like Kushimaru are highlighted like this, it gives them more publicity.

Though! It should be a temporary thing imo, I do agree that some characters should be better...

This was asked for waaaaaaaaaay back in the game's beginning if you remember.

They should have at least limited resources to do this, which they could probably expand upon if they wanted to.

That's arguable. I like Dosu a lot, but I think he was around the same as Lee if not slightly weaker. Dosu did have the default ninjutsu advantage over Lee along with a generally cautious, more calculated nature compared to Lee being rash and foolish. However, after he was forced to remove his weights and did the Lotus attack Dosu would've been defeated if Zaku wasn't around to back him up.

So Lee has a physical advantage while Dosu has a psychological/tactical advantage.

Still waiting for a Sakon skillbreak that makes Rash0mon prompt...

we're going off topic o.o

Actually though, I feel like the Sound Four should've been at least slightly more relevant as well. I mean... they're pretty niche usually...