So
who recognized my cards? There were a few tweaks, because the old versions were terrible. I didn't really have time to come up with all new cards, sorry about that.
The "name a Treasure" bit on Powell/Digger was added when I realized that the card I actually wanted to make was a Chancellor on a treasure. I still wanted to keep some sort of digging mechanic, so that's why it's not only a Chancellor.
I felt that I needed to let players name treasures not in the kingdom. Otherwise, there could be a situation where Digger only combos well if a bad Alchemy card or alt-treasure is in the kingdom, even if you wouldn't pick up that treasure in the combo. It just felt too weird for treasure-Chancellor to be reliant on cards you would never buy.
By the way, for Digger/Tunnel you just name Silver and buy Tunnel over Silver, so forcing people to name treasure on the board doesn't actually help. I really want to simulate it to see how broken it is.
Edit: Oh I completely forgot to talk about Jewels. Credit goes to unnamed-person for suggesting trashing in play as a way to fix Jewels. It's just a massive coincidence that trashing a Treasure with Jewels is equivalent to trashing it with Salvager. However, the ability to trash a $4 terminal silver and get +$4 and the effect of the action was entirely intentional.