First of all, the test data. Also, my first impression is good. It looks complete but not overwhelming.
I do wonder how it will change if certain plugins are unavailable. Is there some version where the cards are labeled to their plugin? For example, Host collections, errata and content views belong to Katello. Recent jobs is REX. That means on a vanilla Foreman, the third column is empty. Do cards shift there to fill it?
On today’s dashboard (which by no means is an example of how it should behave), it is possible to close some boxes. Is that something that’s been considered?
Small detail, but the Power on feels a bit odd to me. I feel that’s closer related to a Host status. Is there also an action related to it to turn it off?
The Last Config Report feels like it also deserves a warning. Here it’s 6 days ago and if it’s Puppet, then it’s out of sync and that is a warning. Has this been considered?
For audits, I think the date is also useful to have and I don’t see that now. I feel like the current example doesn’t tell me much about how that will be filled. Speaking of that, how is recent defined? Last x period, last x changes or combined into last x changes from the past x period?