After listening to your feedback we are excited to share the new Custom Metrics page with you! It includes the creator, creation date, modification date, summary, number of times used in dashboards, data sources used and an option to duplicate the metric. The sorting options are A-Z and last modified metric.
Please note, with the launch of this improvement all custom metrics that have been created in the past will not show any user information. Any new metrics created will show the creator name.
If you have any feedback about this specific change, please let us know!