I have the strong feeling that "Well it worked at time X, so why can't we have it at time Y?" was exactly the reason why they tried to avoid opening the stairs in the first place. People act like safety regulations are only there to annoy people with super heavy doors and way too much bureacracy. "Why can't people just bend the rules? It's just stairs... When something happens, I'm sure we can all use the stairs like supposed to, we're not kids anymore." Well, that's not how it works.
It was really cool that during the critique panel at sunday morning someone from the Security team was sitting in the audience. When this topic was mentioned, she was so nice to explain to us what opening the stairs actually means, especially in an emergency. I don't remember everything, but it would e.g. require three or so specifically trained security members that are allowed and able to go to every floor and kick that small wooden block away from the door under these harsh conditions, so the door could actually close and do its job. And until they are there, it wouldn't, which is already a safety risk on its own. And that would be only one issue of many.
We are incredibly lucky that we've had 24 conventions so far without any kind of huge accident that made it necessary to follow any safety protocol for evacuating the whole buildung and I have the feeling, many people don't take a moment to consider this. Heck, (as far as I know) we still have a bodycount of 0 people, no matter if they could have died of overheating, an accident, wrong medication, an attack, a suicide attempt or someone else's stupidness. Yes, it is annyoing if you have to wait two hours to get to your room or miss a panel because you can't leave your floor. It is even dangerous if you're stuck in the elevator and are already in a bad condition because you had your fursuit one for three hours or have a panic attack. But please keep in mind that an elevator that is stuck is a problem that is still solved way more easily and way less risky than an actual emergency where 2000+ people's lives are at stake and every minute counts.
In my opinion there are two solutions: People stopping jumping AND the Estrel replacing these elevators from the stone age or at least work at a serious improvement. I am no pro, maybe they are alreading doing as best as they can and use everything technology is able to do to reduce this problem. And let's face it: The amount of work the elevators have to do is different from other conferences/events, so the risk of something breaking is a bit higher. However, considering how little changes have been at other issues that are appearing for more than one year despite complains (dirty filter in the air conditioning, a broken lift for wheelchairs,..) I don't trust this theory without any doubt...
Nevertheless as annoying as it is: The EF staff can't rebuild the Estrel. They can't add stairs at the outside and they can't influence the laws of physics when it comes to the question how fire spreads. They can mention their concern towards the hotel - and I am very sure they are already doing this every year, and if you had a room there you can write a (polite) e-mail with a complaint as well. Many issues I heard in the panel I mentioned are things that in my opinion a hotel of his quality should provide/fix asap.
But please reconsider what it actually means to be in an emergency and 50 people can't get out because someone convinced them that hurting the safety rules for half an hour less waiting time would be necessary and worth it. Especially when you are about to say "They should just open the stairs."
Sorry for the sarcasm...
Edit: The one thing we can work on is a faster and easier way to call security/report it when you noticed someone jumping in the elevator, no matter if it got stuck afterwards or not. As far as I know the security hotline didn't work and the button for calling them via the app was very well hidden in 3-4 submenus. This is something to work on, so we can at least do our part of solving the problem.
Also maybe it would help if someone from the security would be so kind to explain a bit more detailed here or in a mail to every participant while ignoring the safety regulations and opening the door is a very bad idea? I'm sure it would clear up some confusion when people could see the big picture better.
It wouldn't solve the problem but maybe calm down the situation a little bit.