Anyone using Azure DevOps?

I'm building an Azure DevOps extension for pull request analytics, and would be keen on some feedback at this stage.

For my MVP I am creating a leaderboard, as well as some basic metrics.
I am currently thinking of getting up to 3 or 4 metrics before launching publicly on the marketplace.

It would be great to hear what metrics you would find to be the most useful, as it will help me prioritize.

Let me know if you'd be keen to try it out.