My initial impression based on a bunch of games is that Witch's Hut and Wheelwright are both on the stronger half of $5s but not super close to the top, they were both relevant and substantially impactful a lot of the time, but nothing gamebreakingly OP. I liked Witch's Hut in particular, because it's a $5 junking attack that doesn't instantly ShiT up the game if one player has a 5/2 and the other doesn't, it's surprisingly usable as the main terminal draw of an engine despite only being +1 handsize but not without substantially changing how you have to approach building it, and there are interesting decisions to when to discard Actions (my intuition so far is that probably most of the time if you have the Actions in your hand even if they're good and you could play them, but it's not always obvious).
Weaver, on the other hand, was only relevant once and it was because I bought Captain (Captain is a super OP card, right?) without paying attention to the kingdom, in which Weaver was the only card it could play. So I gained a bunch of Silvers that game, which was not at all what I was trying to do.