This seems interesting, but would have liked to see dashboard and chart configs cleaned up. Grafana's json configs have the same issue. I have a dashboard for one project. The json is over 13k lines long. Less than 5% of that is unique.
You could use Tanka and Jsonnet to improve this for Grafana dashboards: https://github.com/grafana/grafonnet-lib.
Would that work for you?