There’s no level of acid strength where it makes sense for it to dissolve large volumes of items on the ground, but isn’t invariably fatal on contact with a survivor. If someone has some actual facts about how acids work when in contact with large volumes of various substances, including flesh, that contradict my understanding of this, we can talk, but refering to the previous state of the game or other games isn’t going to get you anywhere.
The previous mechanic where it was sort of dangerous to the survivor but massively damaging to items was a game-ism, and it’s most likely not coming back. The popularity point of view seems to be a wash as well, because there seem to be at least as many people strongly in support of removing item-melting as there are who want it back.
If you have complaints about spawn rates, whether of items or of monsters, we need numbers. “Too high” and “too low” are both so vague that they will be immediately ignored as feedback.
Turrets are just going to be helpless in cities, and only work at full effectiveness if they’re isolated from hostile targets. Just think of them as window dressing if they spawn in a city.