I like the suggestion. I think @ezr-ondrej got it right, this is about moving a host overview to the core, not the whole wreckingball plugin. Any plugin (including wreckingball) could add status to it.
We’d need to introduce some core checks as part of it, so the page is not blank without the wreckingball plugin, as @ekohl points out. I think the first thing to display there would be RFC: Templates rendering status. I can image build status (provisioning success/failed) being a second check. And I guess config management status would be third, however that if it’s not moved to a puppet enc plugin.
I also agree with @ezr-ondrej this evokes dashboard like functionality. However I think the dashboard widget should only display a brief overview. E.g. telling me there’s 3/10 checks that has failed at least on some host. After clicking on it, I should be redirected to this new page, where I can find more details. E.g. I can expand the card to see more details about what the status means, how which hosts are affected. In future potentially even remediate that (triggering puppet, retry the provisioning, open the editor for the failing template, …).