When players enter this area, there should be an Npc you can talk to that will let you spectate the fights going on from different perspectives in the area, or spectate the players. This would especially be beneficial to GvG fights and make it easier to shout cast them for upcoming GvG tourneys or team fights.
Either have an Npc or have a Spectate button/option or something when you enter Obsidian Sanctum.
I don’t know if this has been suggested before, but just in case.