#1 No Jon Moxley presence
I know that he was busy in Japan with New Japan's G1 Climax Tournament action, but a huge glaring omission from FFTF was a lack of presence in any form of Jon Moxley. He's already helped to make the promotion exciting and "must-see", but not having him in Jacksonville hurt the build of the match at All Out.
Instead of getting in the ring or showing up, AEW could have aired a brief promo from the former Dean Ambrose. We could have heard him talk about what he plans to do to Omega after the attack at Fyter Fest. Or he could have blasted Omega in other ways. A simple, pre-taped promo could have at least let us remember of Moxley's looming presence rather than having a commentator mention him during a match.
Another way he could have been used was by a pre-taped segment backstage. If AEW wanted to continue the promotion of the match between Omega and Moxley at All Out, then they could have either pre-recorded another attack or had Moxley "creeping" around backstage as if he's stalking Omega.
It's something that they could have done with their own time before he went back to Japan. Although we know that the time lapses are different and some segments aren't live when WWE uses this tactic, it at least keeps the wrestlers on the minds of the fans.
It also provides something different in the show and it could have been done between matches instead of having the commentators talk on camera every time between bouts.
People are aware that Moxley is going to be at All Out, but that is literally a month and a half away. Other than doing things on social media where some people might miss out, AEW missed out on having Moxley appear to wreak havoc in some way on their last broadcast before All Out.