I can do most of the jumps fairly well, but i dislike them since it creates a huge barrier between those who can use them and those who cant, for the reasons Mcbankington stated. It cant be right for 1/50 players to be able to get upto the enemy GY straight from first aid hut or to hide on the horde tunnel roof. I do like some of the jumps, such as standing on the logs midfield or running over saws to gain a little bit of distance etc, but the more arcane and vaguely exploitish ones that allow a path/hiding place that wasnt intended shouldnt be allowed.