About the remaining revealed cards.
Bard: Simple and probably fine. I'm surprised we didn't get this as a preview. Very soft introduction to Boons.
Changeling: It's confusing and hard to evaluate. There is probably a neat Trader combo hidden in this. In fact, any card that makes you gain Silvers gets a lot more interesting with this present. I like it.
Cobbler: Like a less powerful cheaper nonterminal Artisan, or something. Seems good.
Conclave: It's a Silver-Village! It calls for variety, which is always nice.
Den of Sin: Quite a bit less exciting than the name suggested. An Expedition on-play, but the actual effect is a lot weaker than its counterparts Wharf and Haunted Woods. I expect you'll only get it if you need the extra +cards for the next turn.
Guardian: This I don't get at all. It's a lame reprint of Lighthouse, and that wasn't the most exciting card to begin with. Okay, I guess you can get it just when you're scared of being attacked, but still I think this is my least favorite Nocturne card.
Monastery: I have no idea how this will play, which is a good thing.
Night Watchman: Another gain-to-hand effect. I guess the main use is slogs and maybe setting up a megaturn. Otherwise, the effect seems pretty weak (see Navigator).
Sacred Grove: Feels like it's a bit unbalanced because the +coin option is just much better. But then, maybe it's fine because generally speaking the +coin Boons are on the weaker side.
Secret Cave: Neat, and probably useful for spiking high price points early.
Magic Lamp: I guess here is the Reason we need more Wishes. It's quite nice, though I would have expected something that interacts with being discarded to go with Secret Cave.
Tormentor: The Imp thing is weird and I don't really get it.
Tracker: An action Royal Seal, huh? It seems way less useful and versatile than Watchtower, but then again, it only costs $2.
Pouch: Well. They can't all be super exciting. Though I guess this can be one of the more impactful Heirlooms on boards with no other +buy.
Tragic Hero: Huh. I like that it does the same thing Hero does, but the Tragic Hero dies in the process. Very neat flavor tie-in. It seems like a solid card, though what's a bit strange is that in an engine it is more likely to give Treasures and you don't want them, and in BM it is more likely to stick around when you'd want Treasures.