Consistency: the only case where he used BCE is in an image caption. The description on Wikimedia Commons uses BCE, so my guess is that he defaults to writing BC but reading that subconsciously put him in the frame of mind to write BCE. From a skim, he never uses CE or AD in this article.
Omission: this confused me at first, but really the entire article is set 3000 years ago, so it's not particularly ambiguous. If you think in the context of "lecture on the bronze age" you wouldn't expect him to specify every time.
Omission: this confused me at first, but really the entire article is set 3000 years ago, so it's not particularly ambiguous. If you think in the context of "lecture on the bronze age" you wouldn't expect him to specify every time.