Following this post by Tigole on the US forums, a Blizzard representative - Aeus - made the following comment about further planned changes to the raid content of The Burning Crusade:
On 06/04/2007 09:23:52 UTC Aeus, Blizzard Poster wrote:
We're going to be making some changes to trash mobs in Serpentshrine Cavern and Tempest Keep, to make them a bit easier, slower to respawn, and provide some greater incentive to killing them.
We'll be continuing to tune and re-tune dungeons and encounters, but currently these are the two we're most concerned with and will be focusing on.
Deffinately a step in the right direction again, considering the amount of complaints that has been given regarding the high level instances in BC.