#3 Needs Improvement: The undercard angles
While AEW has done a good job of booking their main event scene - the build-up between Moxley and Jericho has been phenomenal - there seems to be some lacking in the undercard.
While the main event might sell tickets, sometimes it's the undercard that will reverberate with the fans the most after the show is over. It happened at Wrestlemania III, when everyone was talking about Ricky 'The Dragon' Steamboat and Macho Man Randy Savage's mid card title bout rather than the main event match pitting Hogan vs. Andre.
Since the lower to mid card is so important, it's vital that AEW give greater care to its booking than they have thus far. Chuck Taylor and Trent as the Best Friends are over with the crowd, but have yet to develop a really good storyline or angle.
This is true of several of the other lower card acts, such as Private Party and the Lucha Brothers. If AEW wishes to remain competitive, they must book their lower card with greater care.