@luceos a suggestion if I may...
Add some way to start a PM (or byobu) by clicking on a member within the context of a post. Maybe a link/icon on their profile modal that comes up when you mouse over their avatar?
Many times users will be reading a thread and want to send someone a note right there. By clicking on "Private message" or an icon, the intended user would be pre-populated in recipients. That would be sweet and also help with usability.