just listened to this. Overall, the defenders of Dominion did terribly. The first issue taken up in the discussion is theme.
Dominion's theme is super weak, and any attempt to defend it is totally pointless. I mean, yeah, there's kind of a theme, but it really has very little to do with what makes the game great. Defending Dominion's theme just makes it look awful. If it were me, I'd just say, "If theme is important to you, then Dominion is probably not going to appeal to you. Dominion's appeal to casual players is its replayability, which is made possible by the thing that appeals to hardcore strategy gamers: its strategic depth."
The really disappointing thing about the conversation is that there was essentially no discussion of what makes Dominion fun to play, which is figuring out how the cards work together. I mean, there's more than just that, but that's what Dominion has over all other deck builders, and the issue was entirely left out of the discussion. For this reason, the discussion missed the core issue and was disappointing.