In a related issue, I'm curious why the RC didn't indicate a player should get a stance penalty if they throw too quickly before at least one other player in the group is able to get close enough to watch their feet?
For one thing, you can't determine a legal stance before the throw is made. A thrower could get confirmation that a specific stance would be legal, then lift their heel and commit a violation anyway.
Are you thinking there should be a general "don't commit a violation unless someone is looking" clause?
Like these (THESE ARE NOT REAL RULES AND HAVE NOT ACTUALLY BEEN PROPOSED):
If the thrower makes a throw before a determination regarding the position of the supporting points in relation to the lie has been made, the thrower is considered to have made a stance violation.
If the thrower makes a throw before a determination regarding the legality of the thrower's marking method has been made, the thrower is considered to have made a marking violation if the thrower has already had a warning.
If the thrower makes a throw before a determination regarding whether the movement of obstacles in taking a stance was minimal, the thrower is considered to have made more than minimal movement of obstacles.
Etc. for every rule that involves a penalty throws?
It's up to the OTHER players to watch the thrower. That's their responsibility. They should be able to get there in time. Most of the time the away player's lie is somewhat along the way to all the other player's lies, so the detour for at least one of the players should be short enough. If not, they need to go there anyway.
We don't want to introduce more waiting into the game while a thrower begs someone to come into the woods with him to check out his object movement.
I think a better question might be why the rules about determining the status of the disc for OB, two-meter, and now Hazard are needed. Do you know the history?
I guess the reason is that they could involve some sort of close scrutiny and discussion, where the evidence allows careful consideration. Unlike most other calls which need to be called at the time and only when they clearly happen.