Spectator Mode Idea

This may have been come up with before but I haven’t seen it yet. I apologies if this is necro thread, I am fairly new to the game.

Me and my buddy were doing castle nathria and my buddy died. He then come up with the brilliant idea that there should be a spectator mode for dungeons and raids(mainly raids). Within this we should be able to see through their perspective. So like seeing the skills their casting and their positioning.
Rather than just being dead you can watch the other players and help them out. This would be helpful if you have got someone in the raid or dungeon playing the same class as you but is more experienced as you could watch them play and improve how you play.

What are everyone else’s thoughts.