Great read that makes some excellent points. My two cents, based on experience as a steep tracker, flat tracker, freeflier and even sometimes (sshh, don't tell anyone) a belly flier- no two loads are exactly alike and leaders should asses each load accordingly based on number of groups, if tandems are on the load, wind conditions, jump run direction, and group ability. I've exited first with advanced angle trackers to turn 90 degrees off jump run and when done properly find myself miles away from other groups opening back over jump run. Of course, if the actual steepness of the angle jump would also influence this (that was not mentioned in example 1). Skydiving is very dynamic, to settle on absolute hard and fast rules can be dangerous. Organizers and experienced jumpers should teach others to think about the situation at hand and not just what's printed on the "Loading Order" sign.
