Incentivizing spreading hooks would be a good step forward.

From the killer perspective:

When someone asks me as to why I don't tunnel often and care about 4k's, I tend to scramble for a reason. Not reasons, just a singular reason. I like to take the approach of playing how I'd like to be played against but I don't do it for fun or to challenge myself, I find myself getting irritated more often and get punished for it. All the forms of toxicity you could experience on DBD is what I've experienced playing 'fairly' and it's such a demotivator. I recently did a comparison of playing fairly and just playing like most killers I experience as a survivor and I got more BP from that than the way I usually play. I found I experienced way less irritation, I was experiencing far easier games, and I didn't even receive any insults in the endgame chat because that's how normalized such a playstyle is. This helped me realize that playing fairly promotes more 'fun' for the survivor side at the cost of my sanity. There's only consequences to playing fairly. Sometimes I don't even get a simple thank you for giving the last person hatch.

I do tunnel sometimes, because otherwise I'd get steamrolled, and it creates a ton of pressure which only helps ease my games - something hooking others fails to do. It's a valid strategy for sure, but it shouldn't feel so necessary since spreading hooks should be more rewarding for making the game more fun for both sides. I enjoy facing different playstyles that evolve to counter mine and I dislike tunneling, It's just stale and I feel bad for the survivor most of the time.

From a survivor perspective:

It sucks to face all the time. Plain and simple. With how awful matchmaking is, my solo queue teams cannot handle the pressure and they crack. For them to loop for more than thirty seconds would be a miracle. I try my best to help, but body-blocking can sometimes be more detrimental than helpful and there's only so much times you can successfuly flashbang/flashlight/pallet save them. With tunneling comes camping. Killers will proximity camp and wait for the unhook in order to tunnel to create the pressure. Tunneling and camping are hot topics currently with how ineffective the facecamping meter is (progresses too slowly and killers can camp super close for a while). A change to incentivize spreading hooks would knock two birds with one stone if approached correctly and cause a win-win situation. There's no fun to be found in tunneling and camping.

When I'm told to run anti-tunneling perks, I kind of get dumbfounded. Decisive Strike is a waste of a perk slot. Three seconds of a stun equates to one Nurse blink and you're back on hook. You can't even get to a loop most of the time with such a short stun for someone purposefully tunneling you. Dead Hard is a one-time use perk (if a killer falls for it the second time then that's just their fault) but it is decent. The only downside is that if you get hit immediately off the hook, you can't even use it. What's tunneling without camping, am I right? Same goes for Off the Record. We do not have the tools to even inconvenience tunneling properly if the killer knows what they're doing. They don't even wait out the ten seconds, they immediately hit so you cannot get use out of Dead Hard thanks to the wounded effect.

Some thoughts:

I don't know how this could be achieved optimally because there's many options out there. You could lower BP gains from tunneling, provide slower gen speeds if you hooked each survivor once before one was sacrificed, make the game focus more on chases and hooks instead of kills, etc. I don't believe that waiting so long for a Decisive Strike rework will fix the underlying issue for both sides.

Tunneling and camping have been the sole reason for a vast majority of killer winstreaks. I don't understand how the numbers are so high, it either proves how tragically bad matchmaking is or the effectiveness of this strategy. Nevertheless, it should not be possible to win that many times consecutively. No game, with proper matchmaking, has such high winstreaks like Dead by Daylight does. I severely doubt neither the survivors or killers had any sort of fun.

Kills are way too rewarding compared to hooks. Killers literally slug the second last person until they BLEED OUT (four minute timer) just to have a chance to find the last person or hope you fall into a silly ambush almost every single time. Since people tunnel for kills, I wouldn't put it past them to do that all the time.

Perks promoting anti-tunneling for killers won't be used if tunneling is as effective as it currently is.

Tunneling the weakest link out shouldn'tbe as justified as it is. They also deserve to have an engaging experience and not an easy 3v1 opportunity for killers to obtain effortlessly.

I would add more but I'm too tired as of late, I hope everyone reading understands what I mean. I don't see how this wouldn't be a win-win situation for both sides.