enable podAnnotations in helm charts
a lot of deployments in the sub charts don't have podAnnotations enabled. This seriously impacts deployments that depend on annotations (i.e. to disable istio proxy injection for certain deployments, or enable hpa operator, or prometheus scraping). I believe all subcharts are under version control and could be upgraded easily.
An an example, I see that minio has it in the stable branch, but not in your subchart: https://github.com/helm/charts/blob/master/stable/minio/templates/deployment.yaml