The spacing in the style portion of the new report card is really weird. There is a huge space between the course title and assessment information under it. we determined that the builder does not have the ability to fine tune this spacing and that a request should be made in our ideas portal for this specific functionality.
With our 3/6/19 release, the ability to define the line spacing in most of the report card sections has been added. This new setting can be found on the Style Form step when highlighted on a section.