The UI should be channel focused rather than team focused, or provide better channel lists
While the teams/channels grouping makes sense from an organization perspective, it doesn't make sense for a user. Either I only see a few teams and i want ALL channels (so why follow) or I am in many teams but only care about a few channels each.
I should have a section of the UI next to chats that shows channels i follow. When I join a team, it should ask if i should follow all channels right away.
This would simplify things when doing login navigation (vs link/alert navigation) once I have decided how the teams and channels will be organized. A list of channels up top would give direct access to channels where the actual content is stored instead of a list of teams, that gets a list of channels, that finally gets me to content.