I’m rather surprised that this thread has not picked up more traction. I think broken traits is an unacceptable state of the game.
I came here to speak about 2 thief traits I know are either broken or wrongly labeled in the tooltip: improvisation and hidden killer. Improvisation works sometimes but there is no indication of a proc rate in the tooltip. But I have confirmed this multiple times using all venoms in my skills bar. And Hidden Killer does not give 100% crit while stealthed. It just doesn’t.
So I think my fellow thieves should know that some builds are just not going to do their jobs. Be wary of what traits are working and adjust your builds accordingly.
I know this is too much to ask but it would be nice if Anet gave us a list of traits that are know to be dysfunctional and give us a time frame for their repair.