Was playing some good old Black Ops 1 in the weekend and forgot how sweet the spectator mode was. I would love to see spectator mode implemented into BF1, if there are rentable servers then it would make admin's life really easy, they could just spectate said player and watch them for a bit. Kinda like having a referee to a point.
Another cool feature would be a video editor, for example you could save your previous game to a slot (or just download previous game) and spectate yourself, other players and/or free-roam to make videos easier (weren't they going to have something for BF4?).
Anyway, constructive discussion welcome.