I would like to be able to make custom groups of people spaces and then group them by those contacts. This would make organizing groups easy and would allow you to quickly see members of a team then you can chat. Or the spaces associated with those teams. And instead of having Right click add to favorites as the only option, you could right click and add to group. Then in the appearance menu you add an option to group by custom groups.
Similar to old skype see screenshot below
