I wanted to reply earlier, but I had not much time at that moment, and later I forgot. Well, better late than never
I like the Intrigue icon cards. Some more comments:
-I doubt that the wording of the lose track rule in you current rulebook is correct, especially this part
the expected location, which is where the card was when the event was triggered, or where the event itself has subsequently put it. I think this is not true. Suppose you Throne a Mining Village in a Possession turn, and trash the mining village the first time you play it (and then it gets set aside by possession). Then if you play the Mining Village for the second time, it has lost track of itself, hence it cannot trash itself another time. But I interpret "when the event was triggered" as the moment you play the MV for the second time, and by that time it is already set aside, so according to your definition, the expected location of the MV (according to the events on the MV) is where the MV actually is, so the MV has not lost track of itself. But maybe if you define "event" and "moment an event triggers" differently, it could still work...
I chose to have all gaining that involves choosing be two separate events. The reason was that there have been many questions regarding timing in the forums, where people have different opinions on how it works based on whether choosing comes first as a separate step. In Dominion it always does, so I thought the cards should reflect that.
About this, doesn't this hold for everything? Trashing, discarding, etc. For example if you trash with chapel, you first choose all cards you trash, and then trash them, resolving the on-trash effects (so if that makes you draw cards, you can't trash those as well). It's strange you do make the choice explicit for gaining, but not for trashing.
Looking forward to future sets with icons