I'm having some trouble reading through DW as it seems that the text allows for two different interpretations to co-exist. If I read it coming from AW, I know what moves are originally supposed to be and I can see that notion hidden between the lines. However, if I read it coming from your average D&D background, it looks like just another "roll-to-see-if-you-make-it" in which moves are just not another name for class features. For example, a GM that understands how moves are triggered by the players' actions will keep them informed of how and when this or that monster is aware of their PCs so that the players can knowingly trigger Hack'n Slash. On the other hand, your traditional DM will wait for the players to possibly trigger the move and only then will decide if the enemy is aware of them for it to actually be Hack'n Slash (or just roll for damage).
Following this example, is the game suppose to turn into a sneak'n stab kind of dungeon crawl where you walk in the shadows laying all manner of traps and devices so that you can avoid triggering the moves and just get to roll for damage? Or does the GM just go "you know he has spotted you, what do you do?".