Extra characters are expensive, the characters you unlock from previous events (ex. Daredevil and Hellcat for example) are effectively useless after their respective event and dont appear to go into the mission rotation. Bottlenecks with specific missions (almost everyone needs to use the "study at the library" and when you have three or four characters with multi-hour quests there it slows you down tremendously).
That aside a fun game but I agree with some of the folks saying the events almost feel like theyre designed to require in-app purchases to progress in.
macenews about MARVEL Avengers Academy, v1.5.1