Zarhym has shared a little more insight into Blizzard's latest thinking about the dungeon group system going into the game and how they're using it to monitor 5-man action. When a player suggests that they buff Oculus' loot rather than tweak the mechanics of the dungeon, Zarhym replies that that's not the way it's done -- they provide more rewards for higher challenges, not just to direct players around. But he does say that Blizzard noticed Oculus was being singled out as a dungeon that players on the PTR didn't want to run, and that's why they went in and took a look at how it all worked.
That's very interesting, and it tells that (at least on the PTR if not on the actual live realms) Blizzard can more easily get information from the new dungeon system about which instances players are running. That could have all kinds of ramifications -- if they see a lot of Scarlet Monastery runs coming through, or see that no one at all is visiting Maraudon, we may see even more updates coming to those kind of places. And they can use that feedback for future dungeons as well. It'll be interesting to see what kinds of patterns for instance running arise on the live realms -- obviously there's a lot of interest in the "random" dungeon function (that rewards you for running random instances), but that's still weighted towards what instances you've already done. We may see more changes coming to current dungeons depending on what kinds of information Blizzard gets after the patch 3.3 release.
Patch 3.3 is the last major patch of Wrath of the Lich King. With the new Icecrown Citadel 5-man dungeons and 10/25-man raid arriving soon, patch 3.3 will deal the final blow to Arthas. WoW.com's Guide to Patch 3.3 will keep you updated with all the latest patch news.