A super useful feature for many would be a way to organize the servers you're part of.
A folder system where servers could be added. I would like to see the option to rename the group and give it a custom icon.
When you click on a group/folder a drop down menu could appear or something similar.
This could be super useful if you're part of a lot of different but similar discord communities for example World of Warcraft class discord servers or different streamers' discords.