As someone who plays exclusively rated automatch, meaning random kingdoms, I think the biggest bug in Dominion is Silver and Gold. Having those always available means there's a playable strategy on every possible kingdom, and I say that's a bug because most random kingdoms, while technically playable, are pretty boring. What I like about Dominion is fitting a lot of the kingdom into my deck and finding new ways to combine cards. If the game had been designed without the basic treasures, you'd have to make sure the game is playable with decks of only kingdom cards. So there would have to be some rules about building kingdoms (not full random), and more importantly, card design would have to favor cards that fit with all kinds of other cards, and disfavor cards that make bad to buy other kingdom cards.