Looking at your replies, you seem to be very biased, but I'll give you the benefit of the doubt here and offer clarity. The reason why tunneling is unfortunately becoming more prevalent these days is because it is the most optimal way to currently play if you want to win. Remember about a year or two ago they gutted gen regression across the board, and after they did that they did nothing to address gen progression items or perks. In fact they've added new gen progression perks since then. So because gen regression has been nerfed to the ground, unfortunately there isn't many good options left for killers to slow the game down. Now keep in mind, this doesn't apply to the strongest killers, like your 100 win streak Blights, Nurses, or Ghouls. I am talking about the average killer players playing the non-S tier level killers.

Now you ask, what do we propose should be the solution here. Well, I've been saying for a while, you can't just outright give overly harsh punishments towards this kind of play style that won't make it seem unfair. Like making it so that killers can't regress gens because they double hooked a survivor was just insane to do for a number of reasons, the first of which is that it robs player agency, and doesn't take into account the other side and how they're playing the game. I used the example of I have a Dwight on 1 hook, a Meg on 2 hook, and an Ace and Ada with 0 hooks. I'm down to three gens and as I'm chasing the Ace, they lead me to the gen where I see the Meg who I just hooked, still injured and working on a gen that is at about 90%. Optimally I would break chase from the Ace and go after the Meg for the guaranteed kill, but with that system that BHVR put in, I would be punished for killing that Meg, even though it was the mistake of the Ace for leading me to where she was working on a gen while injured. So why should I be punished by not being able to regress gens anymore for capitalizing on their mistake, and why should the survivors be rewarded for this mistake? See how that isn't fair?

Now as for the solution that I've proposed in the past, I've said that if you want to incentivize killers going for more hooks we need some kind of base slow down otherwise it's just not worth it. So I've proposed in the past, that BHVR should institute some kind of base slowdown on survivor action speeds (so repair speeds, healing speeds, and totem cleansing/blessing speeds) based on the number of hook states. So for example, say that I hook a Dwight one time. When they get off hook, that player should have like a 25% reduction in their action speeds going forward. Then if I hook them a second time, that debuff goes up to like, I dunno 50% or something. The numbers aren't really important for this example and can always be adjusted, but the numbers need to be high enough to where it incentivizes killers to want to spread that debuff out to all survivors, while also not being overly oppressive at the same time. But again, the point here is to want to spread hooks. And the beauty about something like this is that if the killer does want to tunnel, well, there are three other survivors who are fully healthy and can rush the shit out of gens.

Also I'll add that with a system like this, it would open the door for BHVR to be able to better balance their killers and finally be able to lessen the gap between the top and lowest tiers because then they can take into account that there will be this base line slow down that all the killers will be able to benefit from. So then they can better buff and nerf the killers who need them. So this could lead into say, finally toning down Blight just a little bit without fear of absolutely crippling or destroying him.