Why is so much vertical space unnecessarily wasted in the next-gen board?
Every bit of vertical space is important so I can see more of the board at once: KPI should be maximum number of issues visible vertically in the screen.
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We appreciate your feedback.
The amount of space on next-gen boards is by design and there is not much difference from a Classic board.
If those fields that you pointed was added along with the board name, it wouldn't allow a longer name or it would be less space to show the remaining days of a sprint, for example.
I understand that you are not using a board name with many words or a sprint, but as this is a cloud site, it's not possible to edit the CSS and HTML of the page to change the location of the fields.
With that said, I'd suggest you to raise a feature request on jira.atlassian.com (project JSWCLOUD) adding more details about why removing those spaces is important for your environment.