You may already be aware, but there are several settings on the "Administration -> System Settings -> Mango ES Configuration" page that display '*' even though they have settings when you go to the corresponding page in the old UI.
Settings we have noticed missing or different in the new UI:
IPv4 (most important for us): Gateway, DNS servers missing
IPv6: Address is displayed, but it seems to be the hardware address.
IPv4: subnet mask
IPv6: subnet prefix length

Also, the title "Mango ES Configuration" should probably be updated.