I'm playing a mix of siphon life/ soul link on my 70 warlocks. This allows my drain life spells to be very powerful with 5x3 instant cast dots on the target and it is almost always my main damage when fighting mobs. Enter Blizzards reworked soul siphon talent (From mmo-champion):
Soul Siphon now Increases the amount drained by your Drain Life and Drain Soul spells by an additional 3/6% (up from 2/4%) for each of your Affliction effects on the target, up to a maximum of 9/18% (down from 24/60%) additional effect.
So I'm dropping from 15X4 = 60% bonus damage to 18% capped.
And so as the world turns, so the teams I play get nerfed and I end up shelving them. This is just in time to start working on my feral druids, so they can get nerfed.