Offer a Favorites channels toolbar or section int he current Favorites left column, which lists favorits team\channel with unread count.
As the activity happens inside channels, it makes more sense to have a fast shortcut to the channels so I can go directly to it with one click.
Today is cumbersome if I have more than 10 teams or so: I have to key-in the name of the team ("General" is everywhere), then go to the team's channels list and click the channel... too many steps!!
Luke Wilson commented
Yep, agree, as more work is to be done in teams we need quick easy navigation to our favorite or high touch areas.
Mike Wood commented
Agreed, this interface is not great when you have multiple teams and then channels under those teams you want to keep an eye on. The current functionality seems more like a way to customize what teams and channels you see and less like a favorite's list. While that might sound similar, it's really not.
I want to be able to see a list of favorite channels in a simple list, regardless of which team they exist in. I don't want to have to collapse/expand team names to get to them. If I constantly work out of 3 channels that are spread across teams I really don't care what team they are in, I just want to see them all next to each other in the list.