It didn't get buffed. Its the same as it was pre open beta. It got buffed in the patch prior to the open beta launch, but its because it was unplayable when it had the opportunity to draw your opponent a silver or gold card.
And yes, everything else got changed. But we arn't even a week into open beta and people are still figuring everything out. So calling things OP, broken, calling for nerfs etc. is a little ridiculous at this point in the game. The meta hasn't settled yet, there are still combos and plays to be discovered.
Millfgaard was a B tier deck prior to this patch and it might be an A tier deck now, but there is no way to actually know until everyone fills out their card collections, gets some solid time in with all the new cards and till we get something resembling a semi stable meta. Right now the meta is heavily skewed by card availability and the newness of everything. Chill your boots on the nerf talk and if Tibor is still going nuts in a few weeks, then we can look at nerfs. Just enjoy the chaos that the meta currently is in right now and experiment.