I actually like the idea. As many suggest the savage shouldn't be as hard as regular savage but definitely a challenge if the teams don't work together. Several games have large and challenging raids, I don't see why we have to be forced to only small group raids.

Also on the flip side it would be interesting to have 4 man raids for say the majority of a fight to meet up at the end to do an 8 man boss. Or even a 4 man raid or two for people with a few friends.