The AP looks great from the spoil list. Don't have the cards yet. Just a couple quick observations.
Cerenerian Deep One - Sometimes a classic should have less temporal abilities than: reduce cost by 1 for each Dreamlands support you control
Ghoulish Hag - At night play him from discard as if from hand, very cool.
Halfling of D'haz - holy crow! Neutral, five combat, offense only, loser of combat struggle additional wound for each icon by which the struggle was lost. You could kill off every opposing character with ease.
Cryptic Writings attachment, can't trigger effects, is great.
The Mutable is a convincing dreamlands card.
ps. Thanks as always nyarlazorbec for the deckbuilder!