Rogues combo points
Blizzard isn't opposed to the idea of letting rogues keeping their combo points when switching from one target to another.
Quote from: Drysc (Source)
Allowing the rogue to keep combo points independent of the target is actually something we've considered for some time. If and/or when it would be implemented is still to be decided, but we're certainly not opposed to the idea.
Ca sera pas encore plus un carnage
(2.3)