The whole "Xenos can't Meta" slogan while meant to be a joke is actually the ONLY correct way of making a multiplayer game. Players will break rules, staff, because they are people, will give incorrect rulings. None of these problems exist if the mechanics of the game do not allow them to exist. You can't break a rule that is hardcoded into the game.
If marines could go 200% their regular speed by pressing a button and then you make a rule saying that they aren't allowed to press that button, how long do you think it takes before someone presses the button?
So why not have all of these problems fixed by devs in the code and design of the game? Why not mechanically fix them?
- It gives staff more time to help people instead of having to go investigate ahelps.
- No one will get salty over getting an unfair punishment because what they did was in the gray area and some other staff members might have ruled differently.
- And not a single player will get away with breaking a rule because it is straight up impossible to do so.
Solution: The same solution that is already in; Podlocks! Neither side can advance until they are down. Neither side can change when they go down. If you think the marines still hold too much of an advantage, increase the time it takes for the podlocks to go down. This way it requires precisely ZERO staff intervention or attention. People can not meta, if the mechanics of the game don't allow it. Which means, you can remove the rule about metarushing completely.
You don't want people camping the tank ladder? (fix the map, problem solved, good call)
You don't want xenos dragging defibbable corpses from the front all the way back to the hive? Change the code so they straight up can't.
On the other hand this also means embracing the fact that so long as the game allows it, no mechanical abuse of the game is meta.
If xenos can drag corpses and devs don't fix it then its intended and thats the end of the discussion.
What I am trying to say is that trying to enforce so many different rules and meta things using staff (people) is an absolutely horrible idea that does not will not and can never, lead to good results.