So I recently discovered warcraftlogs.com. I've just been testing the waters to see if it's something I want to actually use. I read about how it takes advantage of the newly implemented "Advanced Combat Logging" in 5.4.2. Needless to say I turned it on, and went to a target dummy. Funnily enough I had UVLS equipped and was doom spamming all 4 dummies. After the log uploaded I went to see what the option was used for. Apparently part of what it does is track the X and Y coords of players, npcs, bosses, and pets. Using the option "Combat Replay" I was able to watch myself, my pet, and all of my imps move around in realtime on an X, Y plane.
The reason I think this is relevant to Demo, is because if a 25m had 3 or more ToT UVLS demo locks on Council... Yeah... It would have been insane to log the positioning of all the imps. The bandwidth for all that text would have probably doubled compared to a regular log.
Just thought it was interesting. Here's the dummy parse if you want to see what I'm talking about.
http://www.warcraftlogs.com/reports/...0627&end=66734