Why do people say that Kaguya has no development?

[MinaButt]

Are you serious? Did she even get a legit speaking role? Lol

 

[Optimistic]

What no wall of text this time? You disappoint me.

 

[Tantalus Thief]

We've just heard information on her we have yet to see her in person. It;s like with Madara, Itachi and Obito gave us some information on them but then he got edo tensei and now we know more.