Instead of duplicating the Chat sidebar, the lower-left part of the main view should have a PvP Lobby list where people (e.g. @Septima Rhay ) can indicate availability for PvP.
- Only people who appear to be online at the time would appear in the list
- People in games (PvP or AI) would NOT appear on the list
- People who don't check the "Show In Lobby" would NOT appear either
This would mean a chatty member can't accidentally crowd out PvP propositions.
Under the names, there should be a Show In Lobby checkbox which indicate whether the viewer's name appears in the list when the viewer is available.