As you may know Dispersion is the 51 point shadow talent. I personally think It is quite sweet and amazing. But do you think Blizz will make it so that dispersion drops or reduces aggro?
Considering that Fade is the biggest fail at an attempt to reduce aggro, I believe the aggro hording shadow priests need some sort of aggro reducing ability or maybe even aggro drop ability.
keep in mind that the vanish ability says nothing about aggro drop or reduction yet it drops the rogues aggro.