Having the ability for the user interface to remember the last way you sorted the devices inside each group OR a sort field with the group setup. This happens each time you exit Teamviewer/logout or reboot. Currently it is sorted by online/offline BUT it is not sorted any which way after that. Personally, I end up looking for a user and have to sort by name every single time or I use the search bar.
The old version used to remember how you last sorted your devices by group.