The first act was good, at least I enjoyed it. There were lots of new systems on top of the game we've played, but it felt manageable. When act two hit, those systems either remained, partially remained, or were present in a different way, then we added at least five new systems of play into the game. If there was a week in between, where we could read about all of those before we played, I think it would be cool. BUT (as Joe said elsewhere) is it better than just playing the core game?
Anyways, ARCS is still my favorite of Joe's many games.