Eh cc is pretty op in games usually. Unless you have a way to counter the cc (control crowd effects) like resistance to it, block it, or revert it. Some examples of cc are stun, push, pull, shock[stun (usually very short time) but take damage over time], and snare (similar to stun, but you still able to do actions besides movement like shooting). CC and especially aoe CC can mess up bitfighter if you don't make counters to it or make it have a big sacrifice (flaw) like a huge requirement of energy (with huge requirement of energy [like 30% for example], just like triple shot [except triple shot damage is kinda weak compare to amount of energy needed], it will have almost no purpose; so then it's either a ridiculously op weapon or a useless weapon).
Assassins usually like cc because it can lead to so much potential outcomes, so I can see why you want your cc weapon associated with cloak...to kick ARSS.

Assassins are usually an odd class in multiplayer games because they are either weak or overpowered due to their strengths and weaknesses. Usually they are weak because they don't work well with teams, weaker if the enemy is smart, and require having to be stronger than the enemies to assassinate successfully, unless they are op. Basically assassins are only fun in single player games like Assassin Creed or if your enemies are a bunch of newbs. Assassins require more psychological thinking (particular in the tactics of manipulating) than other classes, which seems pointless and odd in a multiplayer game. Assassins are just for the kids to have fun with in online games or for them to complain about...
Teamwork beats a pro usually, unless it's a pro team. Assassins are only good in 1vs1. If it's a team fight, their only strength is the element of surprise which doesn't happen often unless the enemy is stupid. Being able to support your team, like snipers, is far more useful.
I played a game where there's power up if you have streaks or very successful with one life (one soldier's life) and it's unfair when a bunch of newbs fed a player with plenty of points to have damage/defense bonuses that he barely kills me in a 1vs1. This makes snowball effects (snowball is running down along a hill and gets so huge that nothing can stop it) happen and I think it's @%&(*#%&(*.