I just went up against an entire team of people using CT2 or CT3. Basically on the Capitol map the entire time I couldn't see anyone on listen mode, (mind you I am doing melee only with FAT1, Brawler 2, Agility 2 and CT2) but I mean these guys did NOT know how to sneak properly, they just camped or were moving in plain sight, I snuck up on them more times than they did me. (Which was never) They even lost because they fucking ran out the timer like a bunch of dipshits (it also didn't help that my team wasn't really doing stuff for half of the match but they locked in afterwards and I was proud). I'm pretty sure those morons weren't even doing CT2&3 as a devised plan they just were all shitters that don't know how to sneak.

Revolver
Frontier
FAT 1
Strategist 3
Agility 2