I realise it may come across as annoying. But 8.2 being out before xcp-ng Center support catching up has highlighted an issue for me.
I use XO for a lot of things. Especially the backups process. But it being the only option for admin of 8.2 has to be frank, frustrated me.
It is just my way of working. But I do everything from the xcp-ng Center tree view. Collapsed it shows my entire infrastructure then I can expand the list to show VMs on machines I'm interested in, and importantly do this on several machines at once, sometimes all of them, and see exactly what is going on.
This is harder in XO. All the information and functionality is there but much more hidden away on different screens and more difficult to get a quick view of what is going on.
I hope you take this as friendly feedback