It's not so much a voice coaching issue, her voice is just fine, it's how they're having her do these lines, it's honestly more like what you'd get from a fan production. It's all for coolness factor, and it doesn't fit either the character or her natural flow. It's a problem I have with a lot of modern shows that do action/drama, and that's the feeling that I'm watching those interview scenes with wrestlers that they often do on WWE.
This was filmed in 1968 and this is how most Trek dialogue should be delivered or something close to it:
This is actually a problem I have with modern genre TV, especially Disco and the CW shows, where the actors stand on their mark and deliver their lines. They stand while the camera moves. It's like they're static in the scene.
They don't feel naturalistic. They're overly staged and their dialogue is overly self-aware. But the actors do their best, and Disco has one of the best cast on TV right now.
It's like genre TV has moved away from naturalistic dialogue, the type you saw on TOS or on contemporary non-genre dramas.*
*Although shows like The Expanse and the reboot Lost in Space are much better at this.