Periodic Effect Changes on Warlords of Draenor

Warlords of Draenor is about to make some sweeping changes to the way we play World of Warcraft -- in a way that is elegantly reducing those tiny little annoyances that we've dealt with for so long, we've nearly forgotten they were there. One of those items on the streamlining checklist has always been the matter of Damage over Time and Healing over Time spells. Unlike flat casts or attacks, DoTs and HoTs distribute both damage and healing evenly over a brief period of time, through periodic ticks of either damage or healing. These can be layered over direct damage and healing spells to deal more damage and boost those direct cast damage and heal spells to greater effect.
Sounds good, right? Yes and no. There are a few weird quirks with periodic damage spells -- casting a DoT while under the effect of a buff like a trinket proc currently means that every tick of that DoT will be boosted by that trinket proc -- even if the actual buff for the trinket has worn off, an effect called "snapshotting." In addition to this, haste modifies DoT and Hot uptime. The more haste you have, the faster your DoTs will tick. In some cases, stacking enough haste meant that your spell would actually get an additional tick of damage or healing -- which led many players to look for that mysterious magic number of haste that would allow this effect to occur.
Essentially, the developers have gone through and streamlined periodic effects and how they work for Warlords into an elegant solution that should require a lot less tracking, and a lot more paying attention to the world around you, and having fun with that world.

From:http://www.raiditem.com/shownews-714.html