When Lua from Doomhammer posts on the forums asking for a little Karazhan trash relief, Bornakk (who's new on the forums-- not sure whether he's a CM or a mod yet) says no-- Blizzard is happy with the pacing of Karazhan. So you're meant to be taking a long time clearing all those little mana guys before and after Curator.
But this idea of making Karazhan faster brings up another point I've been mulling over for a while now. When we first heard about Kara, a "new 10man instance," back when we were all playing vanilla WoW, I got really excited about the fact that we were going to have a new UBRS-- an epic raid that 10 people could finish off in a few hours. Kind of a short but preview of the bigger raids to come. Fighting Rend while Nefarian was yelling at him was some of the best times I'd ever had in WoW, and I looked forward to leading the same kinds of groups through Karazhan.
But Karazhan didn't turn out like that, did it? It's still more complicated, and for many guilds, it's still the main event. There's a timer on it, most groups take at least two days to clean it out, and while the encounters in UBRS weren't necessarily easy if your group wasn't up to it, the encounters in Karazhan are pretty merciless-- Moroes takes coordination that even the Drakk fight never needed.
That's not necessarily a bad thing-- I like Karazhan a lot. But just as UBRS was diluted from its original form (as a harder 15 man instance with more trash than it has now), I wonder if Karazhan will eventually have the same fate. When more and more guilds have moved up the ladder, and we're all farming Zul'Aman and progressing on Mount Hyjal, will Blizzard eventually nerf Kara into the new UBRS, with streamlined trash and no timer?