Alert templating. Grafana is fussy about configuring alerts on dashboards that have variables. What this means is if you have 30 clusters and want to use a single dashboard with a drop-down variable seefting your cluster you cannot define alerts on it. It will refuse to do it.
Alerts are also integrated tightly in dashboards. Forces alerts to be saved/backedup/imported as single json blob. We want separate management of alerts so they can be defined as code and not in the dashboard blob of json!
What makes me chagrined is because of the above issues we have to use prometheus alert manager instead while our colleagues absolutely LOVE grafana itself! We can't duplicate alerts tens of tens times. We don't want that management nor do we want to teach our colleagues jsonnet/ksonnet to generate it. We also don't want permission problems.