It's still plenty hard. Don't let the soft talk fool you.
Our Karazhan guide finally added what many consider the final boss of the instance, Prince Malchezaar! Having arguably the best loot of the whole instance, this encounter isn't as hard as many would think. Staying focused is a must!
"Pull Malchezaar to a corner or tank him while having your back to the wall to avoid being knocked back by his shadow nova.
On Phase 1, slow DPS to 60%, then bump up the damage to maximum effect. First phase isn't threatening, but from phase 2 on, infernals spawn faster, and can and will corner your raid if you take too long killing him. "
Keep reading Karazhan strategy at Ten Ton Hammer's WoW site.