I'd love to see features that help with workflow/project management. The typical stuff you'd find from Trello, Monday, Basecamp, Mural.ly or InVision.
As an indie game dev I like to keep all my workflow/PM in one place instead of using many of the apps/websites above. I currently just create different channels with lists and post updates so there is no need to browse to other places. When you center this content around a community it makes it even better (especially with your beta testers).