I dunno about stat tracking but its all my roommates been playing since it came out, so that's gotta say something. The first game was god awful in my opinion, and having 99 weapons and hundreds of missions couldn't save it for me, despite the fact that blowing up buildings was fun for a bit.
From what I hear they've solved most of the issues i had with the first game and tripled the amount of weapons in the game. If "kill everything in this area" type games are fun to you, then this one has enough content to last you a LONG time. And coop!
It's true, it's all set in New Detroit (which is not detroit as we know it, its a new city), but the map is different for every mission and takes place in a different part of the city, so you never fight in the same street twice. Fighting in the city is fun because you can destroy buildings and stuff. The non-city levels in the past EDF werent exactly my favorite. And there's a lot of weapons to unlock. The game is short, but its fun to level up all the different armors, and it takes quite awhile to do so.
Seven minutes. Seven minutes is all I can spare to play with you.