I'll say this...I'm not a huge fan of looters shooters, also I would consider myself a big fan of Arkham Batman games..that being said, I genuinely don't understand why people are so butt hurt over this game. The writing is great, the cinematic are great and when you get a hang of the combat system it's genuinely a blast to play. It's fast paced, over the top, just a good time to play.
The more you play and upgrade the skill tree the more enjoyable the gameplay is. When you get a hang of the traversal and incorporate it into the gunplay and mele it's probably the most fun I've had with a game in a long time. Gotham knights was dissapointing and very empty/boring in comparison. People saying it's better than this game are out to lunch.
If you have the budget for it pick it up and try it for yourself, stop relying on internet reviews and make your own decisions.