There are a few related open issues in the Kibana repo that have a similar ask so it's definitely on the team's radar as something people want
Yes, it would be very useful to build interactive dashboards
you'll have to split the field into two (the label, and the link)
You mean via 2 visualizations (1 Metric and 1 Markdown for instance)? I don't think the Metric viz allows this kind of split, right?