Im not so sure that these FPS-Drops are caused by addons. If you check the official forums (no matter if it´s us,en,de or whatever), there are a lot of people suffering from fps-drops since the patch, only while being in combat and usually in the bigger raid instances. Many of these people tried with a vanilla WoW and still had these problems.
Blizzard offered 2 fixes...one recreating the Cache-Folder since they somehow forgot it, one limiting the number of software-/hardwaresoundchannels. If you run the launcher instead of starting WoW directly it will apply both fixes.
This did somehow work for me...instead of 0-1 fps in bwl during combat i got somewhat playable fps...still less than it used to be.
Those fps-drops happen to such a number of users that i doubt all of them have 1 specific addon or 1 specific piece of hardware installed that causes it.
Welll I've been using the Launcher since patch, I'll let you guys know if the lag cleared up after a raid. I never had these issues post patch.
I've been in a 40 man AV runs a lot lately, and experienced 0 lag. But doing MC on a alt run last night, lag like crazy.
Quick Question.. has anyone experienced any graphical lag issues in COMBAT when using AGUF? I'm trying to nail down what is causing this problem. In 40 man raids, I'll experience graphical lag when only in combat. I'm using mostly Ace2 addons except for SWstats and SmartBuff.