I've been busy and haven't had much time in the past few weeks to work on my cards, but I do have a few updates and ideas to post.
First, I've corrected Water Wheel's wording as suggested to mirror Scheme (see above and OP). Thanks all for the suggested wording fixes!
Next, I haven't actually playtested this yet, but I've been trying to think of other variations on Rebellion. The Duchy-gifting was pretty close to what I wanted, however the 3VP swing might be a bit too strong for other players as indicated by Theta. One alternative that doesn't require VP tokens or other mechanics would be "When you gain this, each other player may gain a Silver and an Estate." This would be only a 1VP swing, would still "junk" with Victory cards that can be used for protection from Rebellion, and can also gives players a bit of extra economy with the Silver gifting, like Embassy, though again, they might not want Silvers or Estates and could decline to take them, creating some interesting decisions. The Silvers also might help Rebellion-heavy games to not descend so quickly into green and purple slogs. Thoughts?
Finally, I have another new card to introduce as a potential replacement for Cryptex. While I still like Corridor, Asper pointed out its similarities to Horse Traders and the more I think about it, the more it seems that the card is too similar, and may be a bit niche. If this new one works out, I might use it instead of Corridor.
Originally, I named this Drawbridge as a joke, but the horrible pun was just too much--so now it's called Causeway. It's a cost reducer, similar to Bridge but without +$1, and fitting with the themes of the set it both benefits from and can create small handsizes. Without the bottom bonus, it's strictly worse than Bridge, but if you manage to have no cards in your hand after playing Causeway, you draw another 3 Cards and can keep playing Actions. Like Corridor, Causeway can chain itself under certain circumstances, and is a cute counter to handsize attacks. Originally, it had a "while this is in play" clause like Highway, but I decided to try it without to be more like Bridge--Causeway likes Throne Room even more that way.
I'd love to get feedback on this card too--I've found it to be trickier to playtest as cost reducers naturally tend to have more significant impact on a lot of other cards--gainers, TfB, trashing attacks, etc. Is it balanced? Fun or finicky? Too strong or too weak? Too similar to Bridge?