Today, a game with Wishing Ring, Redistrict, Floodgate, and Harbor.
I printed the "once this turn" version of Wishing Ring, and although everybody guessed how it worked correctly, nobody was 100% sure. People still find Redistrict's wording confusing, too, and I am once again considering changing it to always trash itself. "Trash a card from your hand. Gain a card costing exactly $1 more than it and a card costing exactly $2 more than it. Trash this." Hopefully that's at least clear.
Wishing Ring was almost exclusively used as a Feast for Gold, which is not ideal, but I'm willing to give it another shot before changing it. It was also used to turn a dead Throne Room (played without other Action cards) into a $5 card.
Redistrict was popular. Sometimes it was bought with $1 hands, so the cost change was significant. In addition to trashing Estates, it was used to trash e.g. Bureaucrat for a $5 and a $6 card.
I bought three Floodgates, one early (that I Redistricted next turn), and two late. It was nice for moving two otherwise dead Throne Rooms to my next hand.
Only I bought Harbor this game. It's strong, but I was pretty far behind.