I managed to get aggro all of once; granted there was another warden plus a guardian in the group, and I was not traited specifically for tanking, so I was at a major disadvantage. But cripes! Pulling out all my aggro-yoinking tricks, I just couldn't get aggro for anything. In the end I gave up and just switched to the new "ranged DPS" stance, figuring I could contribute more to the group by pretending to be a hunter instead.
But... meh. If I wanted to be a hunter, I'da rolled a hunter. I really don't want to go back to the days of fighting my way up the aggro chain.
Oh well. I'll look into traiting and gear and see what I can figure out. We'll see.