If a single demo destroys your base if you miss a shot you have a badly designed base

. *I* don't have anything against zombies with lots of HPs, but the demo adds the additional difficulty to kill him safely without just trivially keeping your thumb on the trigger. That volatility you seem to fear is exactly what makes him into a danger.
If the kamikazes have in sum the same hps as a demo then what is the difference really? What makes the kamikazes NOT a bullet sponge in sum when you need exactly the same amount of bullets to get them off the map and they spawn at the same time (if I get your idea right) ? You were repeating your "bad design" mantra without having first argued why really, while some of your new ideas seem like weaker copies of some of the demos features so you presumably have an easier time. At least in your last post you brought up a short summary why you don't like the demo, thanks for that.
I don't think most of your ideas are really bad, but I also don't want to waste my free time analyzing each and every idea someone brings up. Actually it would be more your task to argue for your ideas with a honest analysis of advantages and disadvantages. Ideas are like food recipes, everyone has dozens of them, but only a few are really good. Worse, ideas are recipes without quantities so someone assessing them has to do most of the real work himself.
At a first impression I would say some of your ideas would not bring that much difference to the game **unless** they were actually bullet spongy. I could say a lot more, but I would need to write a few paragraphs to discuss every single idea of yours and its likely consequences. And then you would simply come back with "But I meant this zombie to have this additional characteristic I forgot to mention" and it would go into another round. Sorry, I have seen this too often.
You purposefuly dodge my points about the demolisher and fail to understand why he is a poorly designed enemy. I should just drop this, but let me explain it to you slowly.
- The demolisher, like all late game enemies in the game, has around 800-1200 HP
- The demolisher has 60% damage reduction on top of that
- The demolisher stomps spikes and doesn't take damage
- The demolisher deals the highest amount of block damage to your base (500)
- The demolisher is a steroid version of all other common zombies with the ability to stomp spikes.
So what makes the demolisher so terrible?
The fact that it punishes you and your base, for playing the game. It's the only enemy, in the game, that requires the same focus fire as all other zombies, but even more so because of the damage reduction, but you have to carefully aim to avoid being punished for literally shooting at a zombie horde "trivially" (whatever the hell that means in this context). This is not his "ability", this is artificial difficulty that goes against the main flow of the game, you don't simply put a nuke on the tankiest enemy, that can go off if you miss a shot, on a game about unloading lots of ammo on hordes of zombies that are breaking the blocks in your base.
- Traps can set him off, making your own turrets work against you
- Explosives can set him off, which I think is fine, because explosives are very good anyways, so I agree with that
And in the end, it adds nothing to the game, because his "ability", only acts if you miss a shot or he gets caught in a turret. Which is just annoying, if you can't see that on a game that's about base building and fighting hordes of zombies, I really don't need to continue this thread further. The cop does a much better job at this already, and is the game's best designed zombie yet. Imagine if the gargantuan from plants vs zombies had a chance to explode upon being shot, that's what the demolisher is.
And no, I don't have much trouble with demolishers, and my bases are not poorly designed. The demolisher is objectively a bad design that was shoehorned to create a difficulty spike, instead of having creative blood moons. The blood moons are still easy and will continue to be easy, no matter how many bullet sponges they add to the game, the only thing that will make them harder and more fun, is engaging fights with actual special infected (or nerfing ammo, that's way easier and much more cost efficient in production value am I right lads?)
It's not rocket-science to understand this, I could tune up the damage of the zombies to ridiculous levels, and make the game difficult in ridiculous ways, it doesn't mean its well designed, but it sure as hell gave you more difficulty.
Also, you don't have to defend this game tooth and nail. We're all on the same page here, I like this game as much as you do, if not more, that's why decisions like these annoy me. And seeing people blindly defending it without questioning stuff annoys me even more.