Repetitive, boring, uninspired missions, basically go up to a wall, press action key, go to another spot on the map, press action key, done.
Combat it terrible, headshots mean nothing in this game, doesn't matter if you hit them in the toe or the heart, it still takes off the same amount of damage. Usually, the one who unleashes the most amount of lead into their opponent while circle strafing, wins. Can't shoot through windscreens.
Controls feel laggy and unresponsive, though fully customizable. There's about half a second to a second delay to go from standing to crouching, leaning, or the equivalent of aiming down the sights, which they've called "marksmanship mode". You can't go prone. Crouching behind the majority of cover is useless since most walls aren't high enough to cover your head as well. Leaning and shooting around a corner is difficult, you don't know if you're going to shoot the corner or the guy in your crosshairs. Trial and error.
Horrendous loading times. Small districts, only 100 players per district, you can only interact with 16 players at a time, which is crap for an MMO.
Graphics are pretty good, though I wish we had more control over the graphics quality, but I think it's because I'm on a 32bit OS and have less than 2.5GB of RAM. At the moment I can choose from: Minimal, Medium, Maximum, (there's 4 but I can't remember the name).
My conclusion is that they focused too much time and effort on the customization system and forgot about the gameplay. So basically it's Sims 4: The MMO. The only good thing I liked about the game was being able to shoot while leaning out of a car window, while another player drives.