Borrowed Time should have a cooldown or limit to how many times it can be used in a trial

That's my suggestion. The fact that all survivors in a match can play with this perk and that it has no cooldown or limit to how often it can be used in a trial seems extremely unbalanced.

Pretty much all of the killer perks have some sort of cooldown or limits to their abilities that make them reasonable to counter. I've also noticed a lot of survivor perks don't have any limit or cooldown on them. Alert and spine chill also come to mind off the top of my head.

I think BBQ or NOED come to mind as comparable perks as far as their freuqncy of use and power, but even these have limits and counters. For example BBQ at most gives 6 seconds of aura reading at tier 3 and has conditions required for it to activate (hooking a survivor). NOED can be countered by cleansing dull totems or by cleansing the hex totem that spawns once it activates. BBQ can also be countered by hiding in lockers when someone is hooked.

Borrowed time can be used an unlimited number of times in a trial under its activation conditions and has no cooldown and grants up to 20 seconds of immunity to a rescued survivor. 20 seconds is a quarter of the time required for a lone survivor to finish a single generator, to put into perspective.

It seems like it puts a high level of pressure on the killer especially when multiple survivors are using it and making instant saves or rescuing people before the killer has a chance to get 32 meters away from the hooked survivor. In those instances I typically see an extremely skilled looper/chaser make a rescue while one or more survivors are somewhere else on the map repairing a generator. This puts a lot of pressure on me to decide to abandon the chase with both the rescued and rescuer and try to find someone on a generator so as not to waste time, but that would encourage the survivors to continue to play this way.

It's also very problematic when the survivors are hooked and rescued in this way while near a generator. Then it means you abandon them and basically let them also have free time to heal and work on a generator in the hopes that you can find the other survivors before they finish the generator they're already working on or you let the other survivors finish that gen and waste time chasing the rescuer in hopes that you'll be able to down them before that next generator is repaired, which is highly unlikely.

The only killer scenario I can think of that can build that kind of pressure on the survivors side is playing Freddy with BBQ and Pop Goes The Weasel, and in that instance you have to synergize a pair of killer perks and a killer power to get the same level of pressure as one survivor perk. Otherwise it seems like most killers aren't able to get enough distance across the map quick enough to build that kind of pressure whereas survivors can easily build pressure if they spread across the map on objectives (rescuing, repairing, cleansing).

It seems like the killer's ability to cover distance quickly on the map is the issue, and unless some of these survivor perks are balanced with cooldowns or limits to the number of times they can be used then somehow killers need some kind of adjustment to give them the ability to spread pressure across the map as effectively as survivors can.

Granted I don't see this level of pressure when playing against lower skilled players as killer, but those matches are few and far between with my rank (purple) and the state of the matchmaking system.

I'm not saying something like Freddy's teleport should be a part of every killer's kit, nor am I saying all killer perks are balanced etc. I don't really have any kind of solution in mind. All I'm saying is that there is a balance problem in this specific instance.

What I am saying is that borrowed time, specifically, seems to be unbalanced and offer a high degree of pressure and power for survivors without much thought as to how to use it and it is also used with a very high degree of frequency by almost all higher skilled players and this should warrant some attention from the devs and balance team.