The main downfall of this Superman trilogy has been its direction by Zack Snyder. Man of Steel felt like watching Watchmen, Batman vs Superman felt like watching Man of Steel, and Justice League drew too heavily from the buildup in the previous film.
Pros: much of the interaction between the Leaguers was fun to watch, I loved the origin story of the mother boxes
Cons: I think they could taken more inspiration from the animated Justice League War in bringing these guys together. Honestly, the big bad showing up was always going to bring them together so why all the will-they-won't-they banter? Also, the fights seemed to lack decent pacing. Zack doesn't remember what made the Watchmen fights so fun to watch?