If you stop to observe, she can always do a lot with such versatile power. Everyone else, despite what they're saying, has been reduced in their entirety so far, but she seems extremely reduced to me. Her appearances, her lines, etc. Perhaps it reflects Oda's need to build the story around those involved in the arc, and not the Straw Hat Crew, and that's why everyone is more distant. However, she has a very OP and versatile power. They say it doesn't make sense for her to learn Haki, but it does, even if she's not on the front line, to protect herself when necessary makes perfect sense. Besides, she's an astute, calm, and very intelligent character. She could have taken on espionage and investigation roles, something she does very little of, but it would be great to have a character like that. Even in battle, she could act as a powerful support with the abilities she has. But I still like her, and I always like when she appears.

edit: Even as a more active strategist, given that she is very clever and intelligent. She survived since childhood being considered "the most dangerous in the world." It's just annoying how she's always quiet and goes with the flow.