An anonymous low-level alt on the WoW Raids & Dungeons forums posts about the (lack of) fun her guild has had raiding Naxx after the patch. She bemoans that many useful healing mods no longer work, dungeons keep crashing or lagging badly, and of course, there's the maddening click ... click ... click sound of people joining and leaving the raid, which is the raiding equivalent of listening to someone scrape their fingernails across a blackboard for five hours.
Other raiders note that certain boss encounters are nearly undoable post-patch, including Patchwerk (which was hotfixed fairly quickly) and Instructor Razuvious (priests mind controlling Razuvious's students were not able to use their "pet bar.") Less-progressed raiders have been discouraged by paladin and shaman loot dropping for both factions. And of course, there are the personnel issues associated with trying to raid right after a giant patch. What do we do with these trees of life? Why are all our healers either PVP-specced or missing in action? And for crying out loud, who's been going through half the instance 0-0-0 specced because they forgot that the talents reset?
Have you given up on raiding until the post-patch madness subsides, or are you planning to fight the good fight right up until the expansion?