Stamp Collector:I agree with the others that it's strange to have +1 Action on this, I understand that it means this is a village even with only 1 other action in hand but to me it just destroys all the tension that the fancy action playing ability has. I mean it only costs $2, so you don't want it to do everything for you. I don't love giving it +$1 myself, because this only costs $2, so you don't want it to give too much - it already has the ability to play 3+Actions fairly easily which is powerful! and also because this already draws comparison to Conclave and giving it +$ makes it even closer to Conclave.
Farmer: This is cute, I like it! It seems on the weaker side of things, but next to the nonsense of Cultist and Avanto a more toned down take on this mechanic is nice.
Monk/Reformer: I'm not a fan of Monk, I like Reformer as a super strong "hard to get" card, but if my opponent buys any Monks I'm probably just not touching the treasures for the rest of the game.
Caravel: This seems really weak to me, I think I'd rather have Merchant Ship unless I'm in desperate need of +buy and Merchant Ship sucks! Maybe the on-play could somehow feed into the duration effect so you'll always have cards in the discard pile?
Revolution: This seems broken to me? If there's a $2 in the supply this can give out Curses and gain that $2, while at the same time providing +$2, there are lots of things that make it even better than that, Potion being the most common one perhaps, but Masterpiece and Mint seem like good options too. Not to mention how quickly this can run out piles. It reminds me a bit of Jester, apart from it junks your opponent and gains you a good card at the same time.
Anatomist: This seems incredible once you've drawn your deck, but I suppose most Remodel-type cards are. But if you have 1 card in your discard pile you can just play a bunch of these and upgrade it all the way, or perhaps discard a Province and then just mill a ton of Provinces from the supply, you get the idea. It seems pretty generically strong tbh, I don't really think it needs the +1 action.