Very interesting development with this change. This means that we can progress through further into Ulduar without having to clear everything all over again. At the moment I doubt we will use it but once we have the gear from the first couple of bosses we can choose to leave the raid ID open and then continue next week from where we left off.
3.2 patch notes
3.2 patch notes
•Dungeon and Raid ID Extensions
In order to allow for parties and raids to progress through instances at their own pace, players can now extend an instance ID on an individual basis.
Existing or recently expired IDs can be extended via the Social tab under Raid by clicking on Raid Info.
The ID of any instance to which a player is saved can be extended. Doing so will extend the instance lock period by the same amount of time as the original lock (i.e. extending an Ulduar instance ID will add 7 days, a Heroic: Halls of Lightning instance ID will add 24 hours, and a Zul’Gurub instance ID will add 3 days to the instance lock time).
An ID can be extended more than once.
An extension can be reversed on an individual basis provided the player does not do anything in the instance during the extended instance lock period that would save that player to the instance.