Just because you refuse to listen to audio cues, doesn't make it a bad system. But keep on thinking that because you dictate that audio cues are worthless that it obviates my argument.
*Hint*: It doesn't.
Many people, including myself use audio cues for many things; including timing and situational awareness. If you refuse to use them, that's your fault. Not mine.
The audio cues are nice....but it is true that if there's ever two or more scoundrel/operatives, they don't do much good. Buff icons are also so small that it's not really that feasible to look down and tell what they are at a glance.
Some kind of visual effect on the avatar would help a lot to knowing when certain buffs and procs are up.