That's not because of its eagerness to start trashing. It's because the "AI" is far from truly being a full AI(using machine learning, repeated simulations, etc. to evaluate ways to best reach a predetermined goal) at this point. In a lot of areas it's still a PHI(programmed human intelligence). Clearly there's a programmed hierarchy of what cards to buy at the start of the game that doesn't fully embrace the 2 turn nature of the opening and basically programs in "Chapel is a great card - buy it ASAP" just like it's programmed to always ban Gold when someone plays Contraband. I don't know what if any AI background the Si guys have, but clearly they know to work on this and it will continue to get better over time.