From everything I've seen, the biggest mistake was packing in the Avengers set...it seems to be a consistent let down and probably sets the tone for the rest of the review.
As I've mentioned, I avoided the Avengers set for my initial gameplay time with 2.0 and I have been completely thrilled across the board. By the time I get to the Avengers set I'll be far more prepared to write it off as a misstep rather than a representation of the experience.