Get rekt Harbinger.
I fear tracking issues with Priest during complex turns, but otherwise I like it and the role it fills. The first one does less than Moneylender when trashing Copper, but can trash anything else and still get the +$2. It is also reminiscent of Sacrifice.
Seer has that nice price point range for its draws that keeps it from drawing itself but will help you find your support cards, including most villages. It lets you topdeck the rest too, that's an impressive bundle.
Is Scholar supposed to be the card with only 4 words? Naturally Scholar entices Draw-to-X support cards, but it does discard everything in your hand, so it feels more risky. Really want good deck tracking with it, even if you are just using it as a 5-cost smithy variant. The deck cycling is maybe relevant also.
Experiment seemed really powerful to me at first, as it's two Labs at the cost of $3 and a buy each turn, but so is Expedition. Experiments can have more synergy, but you don't get the draw at the start of the turn.
My schedule is a bit scrambled this week, but I'll try to give my impressions in video form for all the previews sometime before the set comes out. Also, today's previews give me an Alchemy feel.
Random art complaint: It's nice that we get an equal share of female characters now, but I dislike the tendency of portaying them young and attractive. Here we have two old dudes and two younger women.
I don't know, that scholar looks a bit aged on closer inspection, or perhaps just worn out. Still an interesting observation.