I find the format of "I've done wrong; please accept my apology" to be common and sufficient; clearly we have different expectations though -- or they are getting unanticipated amount of pedantic and semantic scrutiny (which in turn will eliminate posts like this, we'll get more corpo-santized-PR, but somehow I don't think that'll make people happy either :).
But there's a big difference between saying that directly to a person and not. Addressing many people, or rather trying to and failing, without getting specific severely reduces the sincerity and effectiveness of the apology.
The apology focuses more on what they did wrong internally, without getting into enough specifics of how it affected the external parties. And, some very serious issues weren't even mentioned.
But this is not direct speech that they use - they use indirect speech referring to "the community" and "our" apology, trying to avoid associating personally with either the problem or the apology.
Then they come out and blame Casey for "not accepting the apology".
So in fact if they can't own the mistake, issue a direct apology, and act like adults, perhaps it's better to let the corpo PR speak in bland tones.
EDIT: the GP of this thread edited their post:
> Casey, I'm sorry. We made a mistake. I made a mistake!