No, as I explained in the OP, the real ones seem a little too similar to Confusion, and don't have nearly and much individuality as is suggested by their names. I thought it would be better if Ruined Village were indeed a Village, but a bad one, or if Ruined Library were a worse version of library.
If I were to change Curse (I wouldn't, it's quite elegant as-is), it would be because I would think the negative points didn't do enough. If I had to change it, I'd either make it a straight confusion, and have no negative points, or I'd have it negate a victory card in your deck of your choice at the end of the game, so it's more likely to matter and as an incentive to buy estates.