I was watching a video about C2 today and I picked up on a little something that will definitely help us out in public and gamebattles matches.
If a player is using the Eclipse(the weapon that allows you to cloak), if you use a flash bang it stun and knock the person out of cloak. And since that it is most likely going to be a popular weapon, it is probably a good idea to have the flashbangs as one of your grenade options. Plus each class allows you to carry 2 types of grenades with you.