I mostly agree with Bogus. But why not make HoC Lurker as a 12 men raid? Maybe that'd be a solution for those who think it would work better for them, but Im not really supporting 12 men raid idea in general. It might sound good in theory but it is very different thing in reality.
I am sure there are guilds around which would have a lot of ppl left out from their raids cause there wouldn't be a spot for them in 12 men set up, while not being able to make two equally good/balanced 12 men raids it would eventually cause more drama than anything else.