Fog is a little too thick at times but it is definitely fun. As a melee enthusiast (and paranoid rare tag owner), it makes way for some of the most intense, most fun battlefield moments.
A lot of people still don't switch their weapons during a roll through of fog so I would recommend a nice shotty and heavy melee combo - simple jukes in the fog allows you to escape enemy auto fire quite easily so if you can evade and land that 1 perfect shotty shot you're golden (and an easy melee kill if you flub the shot