I've read through what you are saying and I don't disagree with a lot of what you are saying. Getting one-shot, etc, is not good and needs to be addressed. I'm working on that among other things. The game definitely should be more about tactics and less about knowing the fight beforehand.
Personally I didn't find Tactician hard at all (Me and my buddy ended up killing the burning Witch at level 11 or so on our first try), but that was definitely done with a bit of cheese.
The scarecrow we encountered at level 9, so we died pretty much immediately. We came back much later and killed them in one try though.

The game's challenge comes from figuring out the cheese way to do something, and I do agree that it's a pretty terrible way of doing things. But from reading your posts it seemed like you just wanted things to be easier than they already are. I want the challenge to remain as high, but I would like a much different type of challenge than the game provides.

The only thing I really disagree on is that the numbers should be the same as the player. As I said earlier, I only see the number as a representation of how much they can take relative to your damage.
But in any case we can agree to disagree there. I don't think the numbers matter overall personally.
I'm not going to say that higher numbers are better or anything.

I also don't necessarily agree on loot, but I don't really disagree either. I personally think that enemies should drop quite a few random items when you kill them, but that it should be the same loot on both difficulties.