I like your guide, and follow many of the rules. I will frequently type "slow, don't kill" after the doors go down. One problem with your door timing advice. If you are the defending team, and position every member away from the spawn door, you theoretically could have no way of watching the door as the attacker.
Not necessarily. Attackers will dictate how Defenders have to position themselves, not vice versa. You'll also have some ranged Attackers that can keep a visual on the door. So you probably will not to depend on a melee Attacker being able to keep your team updated on the door ticks.
Regardless of the scenario, if you understand the logic behind the Golden Rules you'll be able to implement them in your gameplay when it is applicable.