Hot takes without playing any preview games:
Snowy Village: Looks good, isn't good. Making cantrips and other +1 Action cards terminal will hurt too much. Those non-terminal actions are often the glue that makes engines work. Functions best if you can play it late in your turn, which makes it harder for your deck to go off. However, the fact it comes with a +1 Buy means you'll likely pick it up at some point. Probably average.
Sheepdog: Busted in the right setup, not great otherwise. Kinda like Faithful Hound I guess.
Animal Fair: Man I have no idea. This seems pretty good in cases where you have actions that aren't good anymore, like Moneylender. I foresee this card creating many new 3-pile puzzles where emptying a pile mid-turn gets you enough buys to 3 pile. You don't want to actually pay $7 for this if you can help it, but hey, those +Buys, you never know.
Kiln: Seems great. You get this early, you start by gaining cantrips and Villages, then you can gain draw cards once you have the actions to play Kiln then +Cards, then you get treasure gains late if you want them. I think this will compare slightly worse than Haggler, but not by much. Con: need the card in your deck to gain a copy, instead of buying a more expensive card, takes a bit longer to set up. Pro: gaining immediately opens up reshuffle tricks, gain is optional.
Barge: I also have high hopes for this card. The base rate of +3 Cards +1 Buy for $5 is already a card I'm interested in buying. The option to set up duration draw on top of that makes this go up a lot for me. It's not Wharf tier or top-10 tier, but it's going to be better than Den of Sin and Haunted Woods for sure. This is not a card where you only play it as Duration when you've drawn your deck. This is card where you play it as Duration when you are almost out of actions for the turn, or don't want to trigger a bad reshuffle - both those scenarios are reasonably common and the reliability sounds pretty good to me.