Well. Sort of. Certain mods already make up for that in other ways. Other gameplay mechanics could also.
Instead of houses full of ambush zombies. Sitting and nonsensically waiting for you to enter a certain room even though you just shot off 30 rounds outside the front door
You'd just have houses full of potential zombie spawns. That could and would enter any fighting they hear. Now couple that with increased hearing/sight ranges for zombies. Then things like random wandering hordes.
I'm not saying you couldn't still spawn zombies in closets and on trusses but they wouldn't be completely oblivious to the outside world. So yeah. If you shoot a gun every zombie in any house on the street might come for you.
But if you're moving quietly and happen to get surprised and have to shoot it could get really bad. Really quick. With every zombie on the street now coming while you're corned inside of a house.
Now Imagine that happening as a random horde of 5-60 zeds are close too. Now Imagine that at night..
There are plenty of ways to keep zombies dangerous and random WITHOUT turning it into a weird dungeon crawler
But like I said. I do also enjoy the suspense of exploring a new poi. Just not all the time. Sometimes I just wish it was more organic.
That's why a toggle would be ideal.
Wouldn't be that hard. Just a toggle to replace all sleepers with static zombie spawns. You could even make those spawns have a 100% chance of occurring so then a poi with 14 sleepers would still jave 14 zombies in those 14 spots. They just wouldn't be oblivious.
Imagine firing a gun in a city and waking that many pois at once. Can you imagine how crazy that could get and fast?