The main thing wrong with Shadow Priests is our survivability. The attempt to giving us more survivability is lowing our Dispersion cooldown. This is not very effective because while we are Dispersioned we are unable to attack or get some distance from our opponent(s). However, there are several ways of fixing this problem. So, if you have your own idea add it, or voice which one you enjoy the most.
1.) Change Dispersion back to the original version on the beta. Make it restore 6% health and mana again. This will allow us to take some more damage after the effect ends and help our survivability. Also, the effect will be minimal in PvE.
2.) Give Dispersion a small AoE snare effect. The range should be 5-10yrds and lasts at least the duration of the Dispersion. This will give us some repositioning advantage and should help our survivability a little.
3.) Give Dispersion an AoE slowing effect, similar to the Death Knight Desecration talent in the unholy tree. This is the way to go if we think #2 is a little extreme.
My favorite is number 2. What do you all think?