Yes, that is precisely correct. This is one anisotropy that you expect to see in any model, because it’s a fact about us, not about the universe.
The higher modes, however, suggest that the Big Bang wasn’t homogeneous and isotropic. That doesn’t make it not a BIG BANG in a general sense, nor not the Big Bang in the technical sense. It just means that there was more going on than we knew about. We already knew that.
Yes, that is precisely correct. This is one anisotropy that you expect to see in any model, because it’s a fact about us, not about the universe.
The higher modes, however, suggest that the Big Bang wasn’t homogeneous and isotropic. That doesn’t make it not a BIG BANG in a general sense, nor not the Big Bang in the technical sense. It just means that there was more going on than we knew about. We already knew that.