I’ve used spectator mode a bit and I’ve noticed a little issue.
When spectating someone in first person, the replay only updates the position of that person’s reticule about once every half second. This causes the player’s aim to jerk around and snap to different angles periodically instead of smoothly moving the way the player is actually aiming. This is quite jarring to watch and makes watching people in first person somewhat useless.
I feel that the spectate system should be tweaked to update the aim of a first-person view of a player as much as possible to eliminate this jarring effect.