=CHOOSE(A1,-3,-3,-3,-2,-2,-1,-1,-1,0,0,0,0,+1,+1,+1,+2,+2,+3)

Those are very cool! The only thing I'd recommend is to put more fictional results instead of purely mechanical. Like, War Tactics: spend a hold to: separate a smaller enemy force; keep fighting despite overwhelming odds; entrench a position. Some crunch is cool, but you need some spice as well...

I've been playing with wealth in my hack, and an insight I've had is that wealth should not be considered linear. What I've done is I've defined levels of wealth: a couple silvers; dozens of coins; a chest full of gold; etc. The levels are one to two orders of magnitude apart. Whenever you want to by something that is "below" your wealth, no sweat: it's a rounding error in your budget. When there's a price that is comparable, roll! 10+: you get it for "free": you pay but it does not change your wealth; 7-9: you decrease your level of wealth by one category or there is a complication, your choice; 6-: both.
This was a move to simplify weath management though, and you maybe are moving in the other direction. Nonetheless, I hope you find this somewhat useful.

This block thing is very useful. The way I've been doing this lately is this: The player makes a move on an enemy and rolls a success. But I've decided that for example this bodyguard he tries to disarm is the very best fighter in the city, so I deny the player the result of his move. The player gets an XP instead, and a clear description of why his move did not work. I don't tell the players up front that such and such a move won't work, only if they stumble upon it by trying. Clues, of course are abundant, but no discussion whether a move will work beforehand.

For us it works like a charm. Actually I think this is the very best way for marking XP: you encounter something new.

You might want to split the parley move up some:

When you try to talk to someone who prefers to do something else instead
  7-9 they stop briefly and hear what you say, but resume their tasks afterwards
  10+ they find you interesting and are open for more talk

When you try to close an unfair deal:
  7-9 they accept now, but might change their minds later or try to play you
  10+ they accept

When you pose or speak to rouse an emotion and hint at a suitable course of action:
  7-9 they are affected emotionally, and choose some action in line with that emotion
  10+ they are affected and do as you suggest

I think that all of these moves can be used on monsters, NPCs, and fellow PCs alike. Want to scare the goblins? Wany to make allies with the lizardmen? Want to gain an audience with the prince? Want to control an angry mob? Want to charm the audience for some coins? Want to bargain? Want to play with a dragon? Want the fighter to stop for a second? It's all there.
Also, against the PCs, there is no need for the carrot and the stick! I often find that hard to tie to the fiction.

At least in AW, the Act under Fire roll is not to decide if you can refuse or not. The thief can refuse or not as his player wishes. The Act under fire comes to life when he actually does something that is contrary to the wishes of the fighter: try to run away for example.

This is the time when a Defy danger roll is necessary. This is when the images of his mom being beaten up appears in front of his inner eyes, as if it is happening right now. He might get distracted, he hesitates, gives away his intention to run or something similar. In this case, the fighter probably gets the initiative, that's wha this move is good for.

So the "danger" is not that the leverage comes true: it is that you worry about the leverage and it causes all kinds of concerns and hesitation in you.

Now, I am not familiar with the wording and the actual rules of Dungeon World, but this is how it's supposed to work in AW.

This is about the advantages of a very abstract, very simple HP system in more detail.
It is of interest is that hit points in D&D for example are really immunity, like, nothing substantial happens when you lose some HP. It's only important as you approach the limits there, which basically is nearing 0 HP. This is in contrast with AW and your suggestion Paul, because even a 0-harm can knock you unconscious at the decision of the MC and the dice.
What I really do not like with the immediate serious effect (pass out, trapped, drop something etc.) is that they close options instead of opening them up. When you are low on HP, you consider fleeing or a truce, but you are still fully capable.
Also immediate effects are really "tactical", instead of being longer term, interpersonal and complicated. I would prefer to have a system that introduces the needs later, like the need for healing or avoiding medical complications by dealig with other characters. A classical HP system is also capable of this, by forcing you to purchase healing services or stuff.
I haven't gotten my head around this, but it might be interesting to come up with lists of requirements for a harm system, and see how the various solutions compare. I wonder if there was something like that for AW.