So here are a couple of things.
The bullrush->hundred blades is a joke to avoid, most people dodge the bullrush but others just use one of a million "breaks stun" abilities and then dodge rolls out of it. Thief's re-stealthing is annoying but a quick AoE snare or chill with a blast combo pretty much keeps them from getting anywhere. Also if you read the stealth abilities and understand what they have to do to get into stealth they are pretty easy to counter.
As much as I think Elementalists should get buffed I agree that letting the meta game settle first would be a wiser choice.