Results - hierarchical metrics / grouped metrics

I have a suggestion about the results page. Currently the results are shown as a flat list of metrics. In some experiments we want to add a lot of metrics, but some of them are "major" ones (e.g. showing major funnel steps), and some of them are "secondary" (showing additional details about the user behaviour).

So currently in the long list, from a UX perspective, it is difficult to distinguish which ones are the main ones, and which - the secondary ones. It would be good to have a way to either highlight some metrics (and show them with an accent colour, for example), or be able to group metrics - through foldable panels which contain the secondary metrics; or through adding sections with titles, which improve readability.

There might also be other options to do that, of course - I just wanted to pose the issue we're facing as users.