Double edged sword really as preventing a quick one might also create a consequence of "lost match control. "If he somehow does that then that's why I said fair play, not a lot I can do about it. But it would need to be on exactly the correct spot and definitely stationary.
I'm a big believer in actions and consequences when it comes to refereeing and observing, and picked that up from a couple of senior observers. What they would say is that if I did something they didn't agree with they'd be looking at whether my action (or inaction) had any consequences. If it didn't then it would just be non-mark affecting closed book advice, whereas if it did it would be mark affecting formal development advice. The classic example is dissent - if a quiet word approach works with someone that they thought had overstepped the line they would support me, whereas if that approach caused it to escalate and spread to others they would criticise.
Not that different here, if a referee in total control of the game loses control it is my job as an observer to identify any actions that caused this. That might be allowing the quick free kick, or how he managed the aftermath of it.
Say a team chasing a deficit or a win, and you deny them a lawful quick kick and all hell breaks loose. Would you mark the referee down for denying the quick kick?
So, theoretically, in a very unlikely sequence of events the same incident happens two games running, 1 week you'd mark down for allowing a quick kick. And the following week mark down for not allowing it? Based on the consequences of the said event.
Now what if its the same referee. 1 week referee gets crucified for allowing the kick. Next week an observer crucifies him for not allowing it. He is rightly going to feel aggrieved.
Now I know thats very top level and there is so much more to it than that but you can see the angle I am coming from. Surely, you assess whether they were correct in law. And then assess how they handle any repercussions from their decision?
You wouldnt not mark a referee down for not sending a player off for a red card offence as it might have affected match control, if the inaction of not applying the red did not cause any match control issues.