Hey, Dominik from Grafana here. Thanks a lot for the feedback. Totally understand some of the issues you are struggling with. One in particular is something we didn't manage to make to GR8 is the legend issue you are describing. We gonna bring this feature back in 8.1.

Regarding the rest of the issues - would you mind opening those on Github with some more details so that we can help you solving those? You can open issues using this link https://github.com/grafana/grafana/issues/new/choose