Within my WorkSpace I can create separate Space to which I can invite people and they do not have access to the rest of my projects.
Keep conversations open suggestion Backlog
If I chat in multiple conversations simultaneously then navigating between them is cumbersome. I would love the solution applied in gmail's hangouts: you can have many chats opened at the same time and some of them can be minimized and presented as a button with basic info: Name and unread message count. Clicking the button would open a popup with or navigate to specific space/chat.
"Last Tasks" list suggestion Backlog
List of N (5? 10?) last opened tasks.
If I work on a task and have to switch for a short period to another conversation then comming back is pain in the ass. I have to remember what space was the task in and then locate the list that it belonged to.
If I had a list of last tasks then switching between conversations while working on tasks would be a breeze.
Reference a Space in Chat suggestion Backlog
As a user I would like to point my audience to other spaces, may be a nice tool for moderation of a chatty team (myself included)
Given we have a Space called Developers, I'd like to do:
Let's continue our chat in #Developers
Reference a Card in Chat suggestion Backlog
As a user I would like to have a chat about particular cards and have my audience be able to click links.
@someuser please concider merging Card1 and Card2
@somemanager don't forget to bring up Card3 in the meeting tomorrow