The Defend move, p.54, has as one option the ability to deal damage equal to your level.  A high-level PC whose class damage is usually 1d4 or 1d6 would thereby deal considerably more damage than an average Hack and Slash or Volley.  This strikes me as an odd result, but YMMV.

The Aid or Interfere move, p.62, is rolled with "+bond."  Is this defined?  I take it as meaning that you roll with a modifier equal to the number of bonds you have currently with this person, plus the number of bonds you have resolved with this person.  Which provides another incentive to resolve bonds, although over time might make the modifier very high.

I love it!  You totally deserve the spotlight.

The Thief move Trap Expert, p.128, calls for a roll+DEX.  Which strikes me as odd, since the move allows you to perceive and determine more about the environment, which would usually call for +WIS or +INT.  I mean, I can kind of see how you could justify it as the Thief walking around and poking everything very dextrously to figure things out, but I wonder if that was intended.

On p.233 and p.331, instances of "who's" should be the possessive "whose."

In the description of the Lodestone Shield, p.326, it explains that to use the power of the shield you must spend hold, but does not describe how you gain hold to spend.

The effects of missing on the roll for The Ku'meh Maneuver and Other Strategems, p.325, is very unclear.  "The GM can 1 of your hold" does not make sense, and further it would seem that the consequences of failing the roll could be avoided by not giving out advice.

The Druid move Elemental Mastery, p.100, delights me.  But I want to understand it better.  What does it mean to pay "nature's price"?  If you select "retain control" but do not select "the effect you desire comes to pass," can you then simply control the spirit to cause the effect you desire?  I assume not, because if you didn't select "the effect you desire comes to pass"... it won't!  I also assume that the range of effects is limited to what elemental spirits can do, which is largely up to fiat.

Just one line, huh.

"Your friend went to her grandmother's house in the forest a week ago, and has not yet come back."

"As you are haggling over wine in the market one day, flaming arrows come raining out of the sky."

"A passing wisewoman mentions that you will die within the month if you do not find a way to escape your doom"

"Winter is coming, and your people have little food."

"Staggering up to you, a wounded monk hands you a signet ring and in his last breath begs you, "Please...."

I was convinced to join the kickstarter by the promotional efforts of The Bear Swarm and John Wick.  This prerelease is my first look at the rules.  I am loving it so far, though I am still only about halfway through.

I have noticed some unclear things and some errors, so I'll chime in...

P.65, first line, "...he knows he lives on borrowed him."

P.66, "It effects what moves you can make" where "affects" would be more appropriate.  Ditto on p. 139 "effected as usual".  p.144 "effects the illusory image", and "capable of sleeping are effected."

Some of the multiclass moves are unclear, particularly in the Druid's case ("Hunter's Brother" and "Stalker's Sister").  Is the Druid limited to the starting Ranger moves, or can the Druid select Advanced Ranger moves?  If the latter, does the Druid select from the Advanced Ranger moves as if he were one level lower than his actual level?

More an observation than a criticism, but the Ranger move "God Amidst the Wastes" and the Paladin's "Divine Favor" are explicitly weaker the later in the game they are chosen.  Contrast the description in the Fighter's "Multiclass Dabbler" move, when a Fighter picks wizardly or clerical spellcasting.

The Bard move "It Goes to Eleven" is hard to interpret.  The 10+ effect seems like it could be tactically useful to use on either allies or enemies.  However the written consequence for rolling a 7-9 "but then takes +1d4 damage ongoing as the music invigorates it" is extremely unclear.  Who is being invigorated, and taking more damage because of this invigoration?  If this means your enemies are taking more damage, why is rolling in the 7-9 range a more desirable outcome than rolling higher? 

I know nitpicks make me sound like I'm pissing on a hot fudge sundae, but honestly: holy damn do I want to run or play in this game.