Adding to what Crel said above, I found sufficient pet aggro generation to be problematic with either voidwalkers or felguards, particularly aoe threat with two or more mobs. This was surprising to me, even with cleave. I've had a far more pleasant experience with hunters using bear pets that have both swipe and thunderstomp. I'm curious to know how these changes will affect both classes. Right now my 4 hunters and resto druid group cannot handle even regular instances at lvl 74. So, while I've tried both, neither group is progressing in wotlk content.