Hi!
In XO-5 you can see clearly if a host is in maintenace mode" or not. I'm missing a similar thing to the little green/gray dot from XO-5 in the XO6 treeview.
You can see it in the System- Tab under General Information, but only if the host is already selected.
I personally find it difficult to distinct between hosts and VMs in the treeview if a large amount entries are shown. Especially while scrolling.