Allow attaching screenshots when submitting an idea
When reporting something visual (a layout issue, a mockup for a new feature), being able to attach an image directly on the submission form would save a lot of back-and-forth in the comments.
Add dark mode to the ad performance dashboard
Staring at a bright white dashboard at night is rough. A dark mode toggle (even just following the WP admin color scheme) would make the daily check-ins a lot easier on the eyes.