Still on v4.0.11, so if this is addressed in a later version, my apologies.
When looking at a machine on the Infrastructure page, it shows the health check status as v3 did. But when I open up a specific machine, the Connectivity page only tells me that “The last health check encountered warnings”, but not what the warnings were. I have to go look at the task results of the last Health Check task and find the specific machine in the list to figure out exactly what’s wrong.
In v3 the results for the machine were available on a per-machine basis, though I don’t remember exactly where - I think it might have actually been on the Events page (could click on the “became unhealthy” event to expand the details).