This dosen't seem too bad but, when cops die, they stack a lot outside and rarely see them dying outside. I played as a cop myself for three days, never died while waiting outside but this is very helpful for both sides anyways.
Honestly, I hate this situation because you're alone and the crims are trolling with you and you can't do anything to them. To clear my point, Now the criminals can enter the CEs even if they got WL and we need more special things like this idea to avoid getting killed by the crims. So I would like to support your suggestion
This actually make no harm to either side of CnR. Since it tells you more information about CEs. I hope this could solve the camping outside CEs as well. On the other hand, it could let police officers go away from staying around CEs. So they could experience more about CnR instead of stood up outside CE. Voting Positive.