Not much of a FG or NRS pro, so these are mostly QoL/story complaints.
1. Opening boxes one-by-one. At least let us open all of one type at the same time.
2. I'm usually not one to go "Why is/isn't X in this game?" but some additions/subtractions make me scratch my head. There's really no reason that Raven, Hawkgirl, Killer Frost and Deathstroke couldn't return with tweaked movesets (make Snow a more melee-based ice user as opposed to Snart, have Slade use his claymore and hand to hand while Floyd has all the gun focus). Admittedly I'm willing to forgive a lot if the story can justify it, which is why I get Luthor and Captain Marvel not returning, which brings me to...
3. Joker and Scarecrow. I don't know what the policy on spoilers is here, so I'll just say...yeah, these two. What?
Joker was just a hallucination. But yeah Scarecrow came out of nowhere with no explanation.
4. Damien's sudden de-aging. Did not understand it. Is it because the whole Nightwing thing wasn't a twist anymore so they said "Screw it, he's Robin again?"
As far as the story is concerned, he wasn't really deaged.
5. No Alan Scott Skin. Would've loved to see him against Jay, Hal, John and Atrocitus. Hell, imagine getting GA skins of Supes, Bats, WW and Canary too. Justice Society set.