I believe the enhanced rubrics feature would help you, as it allows to change the display of rubrics to more compact formats.
That feature is still in development, though, and may not be available in your instance, so it depends on your local admin permitting it. If they did allow it, you may enable it in your course settings page.
You can probably test it in your beta Canvas instance, but here is a preview of a random rubric that isn't fully visible in the traditional view:

But is visible in the horizontal view:

Or the vertical view:

More information on Enhanced Rubrics (Feature Preview) - Instructure Community