Unread Team & Channel filter
When there are a lot of Teams and Channels it is hard to see them all on one page (even when Channels are 'collapsed'). Having a quick-to-select "Show Unread Teams & respective Channels" filter would make focussing on unread items much quicker and easier
Jim Lim commented
We have many teams and channels, and most of us have come accustomed to the Slack "All Unreads" feature.
Team's "Activity" Feed is similar but it lacks an Unread filter and Mark All Read button. We really need something like this to quickly view all unread messages. Each unread message should be automatically expanded too, more than what the snippets currently show.
This would improve productivity greatly in an organisation where instant messaging is now our most common form of communication.