How is that a problem? You fail, you learn to not repeat what led to a failure, you rinse and repeat until you succeed.
There is close to no reason to wear a BRH ever. Space explorers already have space suits. Miners already have better combat armours. Putting one on serves no other reason than to provoke security. Play with fire, get burnt.
Continuous reduction of antagonists in a round is fully intended. The other options are no reduction or round-ending all antags at once. Both are even worse than what we have.
It is also countered by midround antagonists.
Security gets a lot of freedom between perma, labour camp, exile and execution. Giving security an option that is basically not round-ending for an antagonist would only breed more salt, as all antagonists would expect to get it regardless of their actions.
Antagonists being hostile towards security is fully intended. They're antagonists.
I don't see how it limits RP, either. It actually gives you new RP opportunities as you can be openly hostile towards security and back your words with actions.
Bad luck happens to everyone. All you can do is learn how to reduce chances of it happening.
But let's assume we give antagonists leeway for bad luck. Do we also give security leeway for bad luck? I.e. running alone into two changelings is really unlucky, and the antagonists will freely take advantage of that.
This goes back to point 4, where everyone would expect leeway because luck is almost always a factor.
This barely affects antagonists. I think I have never temporarily brigged an antagonist for more than 15 minutes. It's non-antagonists who rack up insane timers, and they usually deserve them. Antagonists who play full stealth usually know they're clean and are cooperative, leading to security often minimizing sentences or outright turning blind eyes to pettier crimes.
Overall, this is yet another suggestion that heavily favours antagonists at the expense of security players. Should it be implemented, security players would deal with even more shittalking for genuinely just trying to do their jobs and having some fun in a video game.