Nah, I really haven't. Buzzard was problematic but possible to play around, and plenty of decks still had positive matchups against hunter. Undertaker snowballed out of control quickly but was vulnerable when it was first played. The way you beat aggro shaman is keeping the board clear early so they can't chip away for free damage while they set up doomhammer/burn finishes. Now you potentially have to answer a 7/7 as early as turn 3, while still being able to answer trog, totem golem, and feral spirit plus the reach of doomhammer and burn. It's like how sometimes aggro druid would just blow you out with an accelerated fel reaver, except now you don't even have bgh as an option. On top of all that, healbot is rotating out.
So yeah, aggro shaman is going to be an abomination.